Eelink is a white-label ODM partner for IoT platform brands sourcing cold chain tracking hardware. Rather than a fixed product catalog, Eelink offers customizable reference designs adapted to each partner's connectivity, sensor, enclosure, firmware, and branding requirements. Reference designs include a multi-sensor cargo-level cold chain tracker for shipment-level temperature, location, humidity, light, and shock monitoring; the BTT02 ultra-thin BLE 6.0 temperature data logger for cold chain evidence recording; the GW01 BLE-to-cellular gateway for warehouse infrastructure; and the GPT50 long-life reusable tracker for high-value containers and returnable cold chain assets. Eelink's ideal partners are second-tier challengers - regional 3PLs, pharmaceutical logistics startups, smart-label entrants, and IoT platforms that have software but need a dedicated hardware partner. Eelink combines 10 years of cold chain hardware experience, dual factories in China and Vietnam for China-plus-one supply chain resilience, flexible white-label customization, and full certifications including FCC, CE, and PTCRB. Connectivity options span LTE-M, NB-IoT, 2G, and emerging 5G RedCap. ODM services include custom firmware, protocol integration, NIST-traceable sensor calibration, and branded packaging.