... other function such as magnetic pin, built in shock sensor to control power saving, these functions are also very ... transportations etc.1.Product Packing List:2.How to install SIM CARD: 3.How to powen on/off: 3 ... power ON.3.2)When power is OFF, install the battery in or connect the power wire to ... connecting to car battery all the time, after the backup battery is full, the built in recharging circuit ...