Material: plastic-Model: GF07-GPS positioning accuracy: 500 (m)-Battery type: 36h life polymer battery-Load input: AC110 – 220V50/60Hz- Charging output: DC5.0V 300-500mA-Machine battery: 3.7V 400mAh Li-ion battery- Standby time: 12 days- Working time: 4-6 days- Expansion card: mini TF card- Continuous call: 150-180 minutes- Network standard: GSM/GPRS-GPRS: upload60, TCP/IP- Working voltage: 3.4-4.2V DC16s-GSM positioning time: 25 seconds- Basic parameters: GSM frequency band 850/900/1800/1900MHZ