... device for child /pets -GSM GPRS tracker with shock sensor -SOS/movement overspeed alert -Waterproof,monitor -free google software -remote control ... alert-Waterproof, high quality-free google map link-remote control-monitor function -shock sensorGeneral Based on GSM/GPRS and ... seconds.2)Data adds direction, altitude, battery voltage, charging status, number of satellites, the length of the GPRS string ...