Mainly used for home monitoring; children, old people, pet supervision monitoring; car, warehouse security tracking One button for SOS emergency call LBS positioning, fast positioning, low power consumption GSM quad-band network: 850/900/1800/1900MHz Built-in microphone, answer incoming calls automatically Mini size and light weight for easy carrying With exquisite package Specification: Connection: GSM / GPRS GSM Frequency: 850 / 900 / 1800 / 1900 MHz Charger input: AC 110-220V 50 / 60 Hz Charger output: DC 5V 500mA Battery: rechargeable 3.7V 500mAh Li-ion battery Storage temperature: -40 to +85 degree Working temperature: -20 to +55 degree Humidity: 5%-95% non-condensing Package included: 1 x Mini A8 Real Time GPS Monitor Tracker 1 x Power Charger Adapter 1 x Micro USB Cable (about 47cm) 1 x English-Chinese User Manual