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 (Not include) Network:GSM / GPRS GSM band:850/900/1800/1900 MHz GMS positioning time:25 seconds 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. 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.