Description Whether the alarm locator is placed in the car, in children's school bags, the elderly's pocket, or valuables, you can send SMS instructions to the alarm locator via your mobile phone to inquire about the alarm locator's location. This is convenient for you to monitor the entire process and grasp the real-time position. Charging input InputAC110-220V50 / 60Hz; Charging output: OutputDC5.0V 300-500mA; Machine battery: 3.7V 400mAh - battery Standby time: 12. Working time 4-6; Expansion card; mini TF card (not included); Continuous call: 150-180 minutes; Network standard: / GPRS Storage temperature: -40 C to + 85 C Working temperature -20 C to + 55 CH Humidity 5% -95% non-condensing GPRS: Upload 60, / IP Working voltage: 3.4-4.2V DC standby current :: 2.5mA turn on sound control current: 30mAtalk current: 150mA positioning time: 25 seconds Material: Plastic color: Black Package contents: 1 x GPS tracker 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.