Product Specifications: Brand: Rui Feng Wise Model: RF-V8 GSM Band: quad-band network, universal GPS positioning accuracy: 10-15 meters (open sky) Standby time: 12 days vibration alarm: sound sensor alarm: There are built-in battery : There is (a card that is used) Low battery alarm: Alarm displaced: There Remote Pickup: electronic fence:? There Specifications GSM bands: 850/900/1800 / 1900MHz GPRS standard:? Class 12, TCP / IP ? GPS positioning time: Cold start 30sec (open sky) Warm start 29sec (open sky) Hot start 5sec (open sky) GPS positioning accuracy:??? 10-15 meters (open sky) Operating temperature:? -20 ℃ ~ + 70 ℃ Operating Humidity:? 5% ~ 95% RH Dimensions:? 40.0 (L) x34.0 (width) x14.0 (H) mm Weight:? 24 g