Parameters: Type:Mini GPS Trackers Size:4*2.5*1.5cm/1.57*0.98*0.59' Material:ABS Talking time:150-180minutes Standby time:12 days Working time:4-6 days Expansion card:Mini TF Card Network:GSM / GPRS GSM band:850/900/1800/1900 MHz GMS positioning time:25 seconds Power: AC 110-220 V 50/60 Hz Power:5V 300-500mA Battery capacity:3.7V 400 Ma lithium ion battery Working voltage:3.4-4.2 V Storage temperature:-40 to 85 ?? Operating temperature: -20 to 55 ?? Humidity: 5%-95% without condensation. Feature: 1.Support Internet Network data transmission; 2.Supports remote operation of mobile phone. Function: recording, Sound monitoring, GPS track, machine state, restart, etc; 3.Support GPS and LBS (location based service) double tracking system, improve the accuracy of position; 4.Super magnetic power. Build-in 2 pcs strong magnet, you can put it on the metal plate and absorb it automatically; 5.Multiple functions of security, tracking, monitoring surveillance, alarm systems and management as a whole; 6.Handheld and vehicle target. Used extensively for vehicle, person and other moving objects; Package List: 1 * Mini GPS Trackers;1 * USB Cable line. 1 * Using manual Notes: 1.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2.Please allow 1-3cm measuring deviation due to manual measurement.