Feature: 1. When the battery of the product is shut down, the power supply will be connected to automatically start up and continue charging. The SIM card must be inserted when charging. 2. 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. 3. This tracking device sets all functions of security, tracking, monitoring, emerhency alarm and management. 4. It can be put in the car, in a child\u0027s bag, in an old man\u0027s pocket, etc. 5. Positioning/remote listening/voice-activated callback. 6. The error distance of the product is very small. Positioning/remote listening/voice-activated callback. Specification: 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. Features: 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. When the battery of the product is shut down, the power supply will be connected to automatically start up and continue charging. The SIM card must be inserted when charging. It can be put in the car, in a child's bag, in an old man's pocket, etc. The error distance of the product is very small. Positioning/remote listening/voice-activated callback. 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 * 100 * 50mm / 5.9 * 3.93 * 1.96inch Package list: 1 * Device 1 * USB cable 1 * User manual Package List: 1 * Device 1 * USB cable 1 * User manual