Eelink Resource Center provides technical resources for IoT platform brands, regional 3PLs, and smart-label companies evaluating a cold chain tracking hardware ODM partner. Eelink is a white-label hardware ODM — partners design products with Eelink and ship them under their own brand. Resources include ODM partnership case studies covering refrigerated container monitoring across Europe, FSMA 204 compliance implementations for North American food distributors, and automotive finance vehicle recovery at 50,000-unit scale. White papers cover hardware evaluation frameworks across seven dimensions including temperature accuracy, connectivity, battery life, durability, integration flexibility, supply chain reliability, and total cost of ownership, plus cargo-level multi-sensor design and emerging connectivity like 5G RedCap and cellular smart labels. Reference designs span cargo-level multi-sensor cold chain trackers, BLE 6.0 temperature data loggers, BLE-to-cellular gateways, and long-life reusable container trackers — all customizable for connectivity, sensors, enclosure, firmware, and branding. Eelink is a white-label IoT hardware ODM founded in 2004, operating dual factories in China and Vietnam with combined monthly capacity exceeding 500,000 units, serving second-tier challengers across cold chain shipment evidence, refrigerated fleet monitoring, and high-value container tracking. Hardware supports FSMA 204 CTE/KDE recording, EU GDP compliance, NIST-traceable calibration, and 21 CFR Part 11 audit trail requirements.