Note: its work frequency is 900/1800MHz
1. power indicator lights up after insert SIM card in the right direction, enter the standby status1minute later.
2. Dial the number of SIM card with mobile phone, hang up after get through, then the tracker will return a link for the geographic position which shows the map&illustration after open that will be more accurate. (also can logon the link in computer.)
3. High quality recharged call inside having double protect function
charger indicator turn to green after finish charging.
4. For monitor the safety of children or elder only. the postion that this tracker return is only for reference.