Amazon.com: Oyster2 4G/5G Cat-M1 GPS Tracker for Assets - Up to 5 Year Battery Life - Small, Waterproof GPS for Asset Tracking - Car Tracker Device - GPS Vehicle/Trailer/Asset Tracker (Subscription Required):
Linxup GPS Tracking Device w/ 4G Service - 3-3/4" Long x 2" Wide x 1" Tall Linxup Trailer GPS Tracker 300-AT3-S
Trailer tracking | Tracekeeper
GPS Trailer Tracking Device Battery Powered GPS
China 4G car GPS tracker with external battery for trailer tracking (TK418) on Global Sources,4G car GPS trackers,4G truck GPS tracking,4G vehicle GPS tracking
Long Operation Time GPS Vehicle Trailer Tracker, GPS tracker, GPS tracking, GPS tracking unit, GPS locator, GPRS Tracking - Worldwide Technologies, Dehradun | ID: 5704097873
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Trailer GPS tracking unit with 5-year battery life - no wires - no contracts & no monthly fees: GPS & Navigation - Amazon.com
China Trailer GPS Tracker with Lock Function for Container Tracking, Trailer Tracking Photos & Pictures - Made-in-china.com