This tracking device sets all functions of security, tracking, monitoring, emerhency alarm and management. This product has two powerful magnets built in, no need to worry about the problem of placement, as long as there is metal place can be directly put up.  Specifications: Item type: Tracking Device Network type: GSM/GPRS  Frequency of communication: 850/900/1800/1900Mhz Charging input: Input AC110-220V 50/60Hz Working voltage: 3.4-4.2V DC  Charging output: Output DC5.0V 500mA Storage temperature: -40℃ to +85℃  Operating temperature: -20℃ to +55℃ Expansion cards: Mini TF card Continuous calls: 150-180min Humidity range: 5%-95%non-condensing   GPRS：Upload60,TCP/IP Package weight: 34g / 1.19ounce Package size: 150 x 100 x 50mm / 5.9x 3.93 x 1.96inch Package list: 1 x Device 1 x USB cable 1 x User manual 1 x 32G memory card