Waterproof GPS Tracker,Mini size easy to hide,Support 9v - 50v,ACC Detection(ACC Alarm) Easy Installation - Minimal wiring require for installation,Geo-fence alarm & Over speed alarm For Vehicle/Motorcycle/Scooter,2G VERSION GSM 850/900/1800/1900Mhz Built-in high sensitivity GPS&GSM antenna, GPS/GPRS/GSM/SMS Positioning and Tracking,SMS tracking on cellphone with maps link -901 Without Battery:No built in battery inside for back up if disconnect with car or motor battery, no main power off alarm( main power off alarm means sending sms alarm when gps tracker disconnect with car battery). -901 Item Function: Colour:Black Material:ABS Type: B: Without Built-in Battery Package Contents: 1x Car GPS Tracker 1x English instruction manual 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.