Main features: 4G LTE +3G WCDMA+2G GSM. Waterproof IP67 GPS+Beidou positioning, accuracy up to 5 m . WIFI positioning, accuracy up to 30m Web platform/ Phone App for positions check . Pill reminder and Pedometer . Fall detection with alert SOS urgent call for help . Speed dial call . Ring to find the device Historical route display/-fence . Low battery/ changing alert . Talking clock for real time voice telling Product specification: Model A: 4G-FDD:Band 1/2/3/5/7/8/20 3G-WCDMA:Band 1/2/5/8 2G-GSM:Band 2/3/5/8 GPS locating time: 30sec with cold (open ) 29sec with warm (open ) 5sec with hot (open ) GPS positioning accuracy:5-15m (open ) WIFI positioning accuracy:15-100m(Under WIFI range) Working temperature:-20 ~ +70 Working humidity:5% ~ 95% RH Net weight: 45g Battery:1000mAh Screen Size:Under 2 Inches Feature:Internet Connected Battery Life:30 Hours & Up Model Name:RF-V51 4G GPS Tracker :12V Gps Module:Yes GPS type:GPS Tracker Alarm :SOS alarm Battery Type:lithium battery battery life:18 H Antenna type:Ceramic Active Antenna External power supply form:Charge color:Black Material:ABS size:57.5 x 40 x 16.5mm Package Contents: 1 x 4G GPS Tracker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.