The Eelink GPT12-X Ultra is a compact LTE-M / NB-IoT asset tracker built around the Nordic nRF9161 SiP and a 5000 mAh Li-MnO2 primary battery. With multi-constellation GNSS + LBS positioning, motion and light sensing, eDRX + PSM low-power standby and an IP67 sealed enclosure, it delivers 3-5 years of fit-and-forget visibility for trailers, containers, pallets and other unpowered assets.
GPT12-X Ultra: The Fit-and-Forget Asset Tracker — Multi-Year Visibility for Assets With No Power
Traditional battery-powered trackers either die early or disappear between check-ins. GPT12-X Ultra sleeps at microamp levels using LTE-M / NB-IoT eDRX + PSM, yet wakes in seconds via SMS or network paging — and instantly on rogue motion or tampering — to push alerts and live tracking.
- Nordic nRF9161 SiP: LTE-M / NB-IoT modem, application MCU and hardware security in one package
- Multi-constellation GNSS (GPS / GLONASS / BeiDou / Galileo / QZSS) with cell-ID LBS fallback
- 3-axis motion sensor + light sensor for towing, impact and tamper detection
- Slim 100 × 53 × 12.5 mm housing, hidden mounting on chassis, pallets and door frames
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Overview
Most unpowered assets do not need constant tracking — they need reliable evidence when it matters. GPT12-X Ultra is built exactly for that: eDRX + PSM sleep architecture keeps idle current in the microamp range, waking only on motion, tampering, schedule or remote command, so a single primary cell delivers years of dependable visibility instead of months.
Nordic nRF9161 SiP Core
Single System-in-Package integrating the LTE-M / NB-IoT modem, application MCU and hardware security, paired with a dedicated multi-constellation GNSS receiver for long-life deployments on modern IoT networks.
Multi-Year Primary Lithium Power
Sealed 5000 mAh Li-MnO₂ primary cell with near-zero self-discharge eliminates chargers and wiring, enabling multi-year autonomy at low reporting rates for truly deploy-and-forget installations.
eDRX + PSM Instant-Wake Architecture
eDRX keeps a lightweight control channel open for SMS and downlink commands, while PSM drives idle current into the microamp range. The device sleeps most of the time yet wakes instantly on network or sensor events.
Global LTE-M / NB-IoT Connectivity
17 LTE-M / NB-IoT bands cover the leading IoT networks across North America, Europe and Asia-Pacific, simplifying cross-border deployments for global supply chains.
Multi-GNSS + LBS Positioning
GPS, GLONASS, BeiDou, Galileo and QZSS deliver ~2 m accuracy under open sky, while cell-ID LBS provides a fallback when satellite visibility is poor, keeping assets visible across yards and depots.
Motion, Tamper & Light Sensing
A 3-axis accelerometer and a light sensor capture movement, impacts, towing and enclosure-opening events, waking the device from standby to push Activity or Emergency tracking profiles.
Slim, Rugged IP67 Enclosure
Thin 100 × 53 × 12.5 mm sealed housing rated IP67 against dust and water, with adhesive, screw and cable-tie mounting options for harsh outdoor environments from -20°C to +65°C.
Multi-Mode Firmware & Open Integration
Built-in Standby, Trip, Activity and Emergency tracking profiles, plus the open EELINK protocol and APIs for integrating GPT12-X Ultra into Keelin or third-party visibility platforms.
Is GPT12-X Ultra right for your project? Best for:
- Unpowered trailers and semi-trailers
- Shipping containers and yard assets
- Pallets and returnable transport items (RTIs)
- Rental and light construction equipment
- Remote infrastructure without local power
- OEM / ODM asset tracking programs
Not the right fit for:
- Continuous 24/7 live tracking over multiple years — use Emergency mode for incidents only
- Regions without LTE-M / NB-IoT coverage (no 2G / 3G fallback)
- Indoor high-precision positioning
- Cold chain temperature monitoring as the primary requirement — see GPT29 or BTT02
- Wired vehicle telematics with engine data — see TK417
Technical Specifications
Validated against the Eelink GPT12-X user manual. Contact Eelink for the full datasheet and market-specific certification details.
| Category | Detail |
|---|---|
| Core & Connectivity | |
| Product name | GPT12-X Ultra — Multi-Year LTE-M / NB-IoT GNSS Asset Tracker |
| Core chip | Nordic nRF9161 SiP — integrated LTE-M / NB-IoT modem, application MCU and hardware security in a single package, paired with a dedicated multi-constellation GNSS receiver |
| Cellular network | LTE Cat M1 (LTE-M) / NB-IoT (NB2) Bands: B1 / 2 / 3 / 4 / 5 / 8 / 12 / 13 / 14 / 17 / 18 / 19 / 20 / 25 / 26 / 28 / 66 |
| GNSS | Multi-constellation: GPS, GLONASS, BDS (BeiDou), Galileo, QZSS Typical accuracy ≈ 2 m (open sky) · Hot / warm / cold fix <3 s / <26 s / <35 s |
| Positioning modes | GNSS (primary) + cell-ID LBS fallback (>100 m, depends on base-station density) |
| Antenna | Built-in LTE-M / NB-IoT antenna, ceramic GNSS antenna |
| Power | |
| Battery | 5000 mAh Li-MnO₂ primary cell, near-zero self-discharge, sealed (non-rechargeable) |
| Battery life | 3–5 years @ 1 position report/day in long-standby mode (typical field profile), depending on network conditions and temperature |
| Power saving | PSM + eDRX — microamp-range sleep current with periodic eDRX listening windows for quick wake via SMS / downlink without losing network attachment |
| Wake-up sources | eDRX network wake (SMS / downlink), 3-axis motion sensor, light sensor, scheduled timer (10–65535 min interval), manual button |
| Sensors & Interface | |
| Sensors | 3-axis accelerometer (motion / shock / drop detection) Light sensor (tamper and enclosure-open detection) |
| Indicators & controls | Blue LED (GNSS status), Red LED (network status); power button (press ≥3 s to turn on) USB Type-C for configuration and debugging (not for daily end-user operation) |
| Alarms | Vibration / shock / collision, geo-fence entry / exit, light-sensor removal alarm, motion wake alarm |
| Physical & Environmental | |
| Dimensions & weight | 100 × 53 × 12.5 mm · ≈ 80.5 g (with 5000 mAh battery) |
| Enclosure & protection | Sealed industrial enclosure, IP67 rated against dust and water |
| Operating temperature | -20°C to +65°C |
| Installation | Screw mount, adhesive mount or cable ties; optimized for hidden mounting on trailer chassis, containers, pallets and door frames — top side (“THIS SIDE UP”) toward the sky |
| Platform & Firmware | |
| Reporting modes | Long Standby (1–4 reports/day) · Trip (start / stop, motion-based) · Activity (continuous while moving) · Emergency (high-frequency on demand via SMS or platform command) |
| Cloud & platform | EELINK protocol; compatible with Eelink Keelin platform and apps; open protocol for third-party integration via TCP / UDP |
| Firmware & OTA | Secure FOTA over LTE-M / NB-IoT using nRF9161 security features; remote configuration of reporting profiles, geofences and alarm thresholds |
| Certifications | CE / FCC and carrier approvals depending on region — consult Eelink sales for the latest market-specific certifications |
Operating Modes & Battery Scenarios
Choose the right mode for your use case — each one balances tracking frequency against battery life, and modes can be switched remotely at any time.
Long Standby Mode
How it works: Wakes at preset intervals (e.g. every 24 hours), acquires a GNSS position, reports, then immediately returns to deep sleep.
Best for: Shipping containers, static pallets, warehouse inventory, long-term storage, assets in remote locations.
Trip Mode
How it works: Records the start position when motion is detected and logs the stop position after ~4 minutes of inactivity, minimizing data transmission.
Best for: Rental equipment, trailers, returnable pallets, vehicles with intermittent use.
Activity Mode
How it works: Wakes on motion and reports every 5–10 minutes while moving; auto-sleeps after ~4 minutes of inactivity.
Best for: Active fleets, construction equipment on job sites, regular shipments needing live visibility.
Emergency Mode
How it works: Maximum intensity — reports every 1–5 minutes continuously (configurable). Triggered remotely via SMS, platform or API, then auto-reverts.
Best for: Theft recovery, high-value asset protection, temporary live tracking during incidents.
Battery Life Estimator
Pick a mode and adjust how often the device reports or moves — the estimate updates instantly. Figures are indicative for typical LTE-M conditions at moderate temperatures.
Estimates are indicative. Actual battery life depends on reporting frequency, network quality, GNSS fix conditions, ambient temperature, movement events and emergency-mode usage.
How to Choose Your Mode
- Storage / warehouse: use Long Standby Mode for maximum battery life.
- Periodic shipments: use Trip Mode to log start / stop positions only.
- Regular operations: use Activity Mode for tracking while moving, auto-sleep when idle.
- Emergency / theft: activate Emergency Mode remotely for continuous live location until the asset is recovered.
One Hardware Platform, Many Use Cases
GPT12-X Ultra fits projects where power-free, multi-year tracking matters more than ultra-high reporting frequency — from trailers and containers to rental equipment and remote infrastructure.
Trailers & Semi-Trailers
- Track unpowered trailers without touching vehicle wiring.
- Keep a continuous history of utilization, door-to-door trips and dwell time.
- Raise towing, impact and yard-movement alerts from motion and geofence events.
Containers, Pallets & RTIs
- Slim profile housing for in-container installs on pallets, racks and other RTIs.
- Multi-year tracking as assets move across yards, ports and warehouses.
- Light and motion events plus periodic heartbeats for tamper, movement and loss-prevention alerts.
Rental & Construction Equipment
- Deploy the IP67-rated GPT12-X Ultra on rental equipment and light construction assets.
- Monitor utilization, abuse and contract violations with motion and zone-exit events.
- Run multi-year deployments without on-site visits for charging.
Smart Fleets
- Asset-level visibility without wiring into the vehicle CAN bus or on-board power.
- Ideal for low-mileage, seasonal or specialty fleets using Long Standby mode.
- Overlay tracker events with TMS / telematics platforms via APIs for planning and billing.
Remote Infrastructure
- Monitor gates, cabinets, pumps and temporary outdoor sites with no local power.
- GNSS plus motion and light sensors for door-open, tamper and movement alarms.
- Schedule periodic check-ins to prove uptime and SLA compliance.
OEM / ODM Projects
- Build custom variants on the proven GPT12-X Ultra hardware with Nordic nRF9161.
- Add tailored firmware, labels and enclosures for specific verticals and customers.
- Shorten time-to-market with reusable certifications and dual manufacturing sites in Yibin, China and Haiphong, Vietnam — 500,000+ units/month combined capacity for supply chain resilience.
Any asset without easy power — trailers, containers, pallets, racks, rental equipment and outdoor infrastructure — can benefit from GPT12-X Ultra’s multi-year tracking and ultra-low-power design.
Installation: Hidden, Secure, and With Sky View
- Keep the marked top side (“THIS SIDE UP”) facing the sky for reliable GNSS performance.
- Avoid thick metal directly above the antenna — plastic, fiberglass or open structures are fine.
- Match the mounting method to the asset surface: screws, industrial adhesive or cable ties.
- Validate before full rollout: confirm first GNSS fix, platform reporting and alert delivery, then scale.
Integration & API
GPT12-X Ultra reuses Eelink’s proven protocol and cloud stack. Start quickly with the Keelin platform, then integrate directly into your own systems using server-side APIs, the EELINK device protocol or SMS.
Example: fetch the latest location. Devices can be accessed through server-side REST endpoints to retrieve current state, history and alarms. The illustrative example below shows a simple “latest location” call.
Device protocol (EELINK). GPT12-X Ultra uses the same compact binary payloads as other Eelink asset trackers, with additional fields for LTE-M / NB-IoT network information, power model and the extended sensor set. Protocol documentation, sample payloads and reference code are available on request.
Platform integration. Compatible with major fleet management and IoT platforms:
- Eelink Keelin platform (web + app)
- Traccar Server (open source)
- Gurtam Wialon
- Navixy
- Flespi
- ThingsBoard
- AWS IoT Core
- Azure IoT Hub
- Custom enterprise platforms via API
Typical SMS command set. SMS provides a robust backup channel — particularly important for long-standby devices where PSM and eDRX are heavily used. See the full Eelink command list for details.
Built for Standard Deployment. Ready for OEM / ODM Customization.
For IoT platform brands, logistics software vendors and industrial solution providers, GPT12-X Ultra can be adapted to your deployment model — delivered as an engineering program, not a promise.
- Logo, label and packaging customization
- Firmware reporting profiles and alarm logic
- Protocol / API adaptation for your platform
- SIM, APN and server pre-configuration
- Mounting accessories for specific assets
- Regional certification planning
- Sample → pilot → mass-production support
- Long-term firmware maintenance & OTA strategy
Manufactured across dual sites in Yibin, China and Haiphong, Vietnam — 500,000+ units/month combined capacity for supply chain resilience, under ISO 9001 / ISO 14001 / IATF 16949 quality systems.
Technical Resources
Everything you need to evaluate, deploy and integrate GPT12-X Ultra — from a four-page overview to engineering deep-dives on battery, security, connectivity and installation.
Frequently Asked Questions
Quick answers to the most common questions about GPT12-X Ultra battery life, connectivity, installation and integration.
What is the actual battery life of the GPT12-X Ultra?
GPT12-X Ultra is designed as a multi-year tracker. In typical deployments with one location report per day on LTE-M / NB-IoT, plan for around 3 years of battery life. In ultra-low-frequency profiles on optimized networks, deployments can reach roughly 4–5 years. Actual life varies with reporting interval, use of emergency tracking, network quality and ambient temperature.
Can I extend the battery life?
Yes. To maximize battery life:
- Use low-frequency reporting where possible (for example, one report every 24–48 hours).
- Reserve Emergency or real-time modes for short incidents instead of continuous use.
- Use standby or deep-sleep profiles when assets are idle for long periods.
- Rely on motion-triggered wake so the device reports mainly when the asset actually moves.
Is the battery replaceable?
The internal primary lithium battery is not user-replaceable. GPT12-X Ultra uses a sealed IP67 enclosure and non-rechargeable lithium-manganese chemistry to achieve multi-year life, very low self-discharge and robust environmental protection. At end-of-life, plan to replace the unit or use Eelink’s repair / refurbishment services according to your contract.
Does GPT12-X Ultra support continuous real-time tracking?
Not as a permanent mode. GPT12-X Ultra is designed for low-frequency, event-aware visibility: Activity mode reports every 5–10 minutes while assets move, and Emergency mode delivers 1–5 minute live tracking on demand for theft recovery or incidents. Running high-frequency tracking continuously would consume the primary battery in weeks. For always-on live tracking with vehicle power, consider the wired TK417 instead.
Can the tracker be woken up remotely?
Yes. Thanks to the Nordic nRF9161’s eDRX and PSM capabilities, GPT12-X Ultra can listen for network pages even while sleeping. An authorized SMS or downlink command can wake the device, request an immediate location, or switch the operating mode to a higher-frequency emergency profile.
Which cellular networks does GPT12-X Ultra support?
GPT12-X Ultra uses LTE Cat M1 (LTE-M) and NB-IoT (NB2) for wide-area connectivity. The radio covers commonly used IoT bands including B1, B2, B3, B4, B5, B8, B12, B13, B14, B17, B18, B19, B20, B25, B26, B28 and B66, enabling deployments across North America, Europe, Asia-Pacific and many other regions. There is no 2G / 3G fallback, so LTE-M or NB-IoT coverage is required for live reporting.
What positioning technologies are supported?
GPT12-X Ultra uses multi-constellation GNSS — GPS, BeiDou, GLONASS, Galileo and QZSS — plus cellular LBS as a backup when GNSS is unavailable. In good sky-view conditions GNSS accuracy is typically within a few meters, while LBS provides coarse positioning (on the order of 100–200 meters) in dense urban or indoor environments.
Can GPT12-X Ultra be used globally?
The supported LTE-M / NB-IoT bands are designed for global deployments, but real-world availability depends on local operators and roaming agreements. Before large-scale rollout, check coverage maps for your SIM provider, run a small pilot in each region, and confirm that at least one LTE-M or NB-IoT network is available at your key sites and corridors.
Does GPT12-X Ultra require wiring or an external power supply?
No. GPT12-X Ultra is a self-contained, battery-powered tracker. There is no need to connect to vehicle power or run cables. Once the SIM is provisioned and the device is activated, installation is simply about physically mounting it in the right place on your asset.
Where should I place the tracker on a vehicle or asset?
For reliable GNSS performance, mount the face marked “THIS SIDE UP” upward with as clear a view of the sky as possible. Avoid placing the device directly under thick metal, heater film or metallic-coated glass. On vehicles, typical locations include under dashboards with plastic covers, inside body cavities with plastic or fiberglass panels, or on cargo surfaces where the top side has sky view.
How can I verify that an installation is working?
After mounting, take the asset outdoors, wait for the device to obtain a GNSS fix, and confirm that it appears on your tracking platform with the correct location. Trigger a short movement or power-on event to verify that alerts and history records arrive as expected before closing panels or handing the asset over to operations.
Which platforms and apps work with GPT12-X Ultra?
GPT12-X Ultra is fully compatible with Eelink’s Keelin web platform and mobile apps for real-time tracking, history playback, geofencing and alert management. Many customers use Keelin as a turnkey solution, while integrators connect the device directly to their own servers using the documented EELINK protocol.
Can we integrate GPT12-X Ultra with our existing TMS, WMS or ERP?
Yes. Eelink provides open device protocols and server-side APIs so your developers can ingest location and event data into your own applications. Typical integrations use a TCP / UDP listener that parses EELINK binary messages and then exposes them via REST APIs, message queues or webhooks inside your backend. Protocol documentation, sample payloads and reference code are available on request.
Does GPT12-X Ultra support remote configuration and firmware updates?
Yes. Devices in the GPT12-X family support over-the-air firmware upgrades and remote parameter changes, such as reporting intervals, working modes and alarm thresholds. This lets you refine behavior after deployment without recalling hardware — just remember to leave some battery budget for occasional FOTA sessions in your lifetime planning.
Can Eelink customize GPT12-X Ultra for OEM / ODM projects?
Yes. Eelink operates as an ODM manufacturer: GPT12-X Ultra can be adapted with custom firmware reporting profiles, alarm logic, branding and labels, packaging, protocol or API integration, SIM / APN / server pre-configuration, mounting accessories and regional certification planning. Programs typically run from samples through pilot to mass production across dual manufacturing sites in Yibin, China and Haiphong, Vietnam.
Similar Devices
Explore the wider Eelink range of long-life asset tracking and cold chain solutions.
| Model | Best for | Power | Network | Key advantage |
|---|---|---|---|---|
| GPT12-X Ultra (this page) | Slim, hidden tracking of unpowered assets | 5000 mAh primary | LTE-M / NB-IoT | Compact multi-year life with tamper detection |
| GPT50 | Pallet & container long-life tracking | 24,000 mAh | 4G LTE Cat-1 | 5–8 year battery life |
| GPT48-X | Magnetic quick-deploy asset tracking | 8000 mAh primary | LTE-M / NB-IoT | Magnetic install, up to 5-year standby |
| GPT29 | In-transit supply chain visibility | Battery + solar | LTE Cat-M1 | Solar-assisted, multi-sensor monitoring |
| BTT02 | Cold chain temperature logging | Primary cell, 3-year | BLE 6.0 | Ultra-thin ±0.2°C logging |
Ready to Scale Your Asset Visibility?
Talk to Eelink’s engineering team about samples, custom firmware, OEM / ODM variants and volume pricing for the GPT12-X Ultra.