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 With Battery:Built-in battery capacity: 150mAh.It has built in battery inside for back up (gps tracker can still work for few hours if disconnect with car or motor battery), and main power off alarm( main power off alarm means sending sms alarm when gps tracker disconnect with car battery, very useful if the thief try to disconnect gps tracker and steal the car). Colour:Black Material:ABS Type: A: with 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store