... against theft, Protecting child,Elderly- GPS Tracker tk102 (DW-D-007) gsm gps tracking device with Powerful magnet+water proof/WAP ... 3.7V 800mAh Li-ion batteryAccessories:1 x DW-D-007( TK102 )GPS tracker2 x Rechargeable Battery 1 x Battery Charger1 ... gift** OEM is warmly welcome GPS Tracker tk102 (DW-D-007)