Features This tracking device combines all the functions of security, tracking, monitoring, emergency alarm and management. The product has two powerful builtin magnets, so you dont have to worry about the placement problem. As long as there is a metal place, it can be placed directly. When the battery of the product is discharged, the power supply will be connected to automatically start and continue charging. The SIM card must be inserted during charging. It can be placed in the car, in a childs bag, in an elderly persons pocket, etc. The error distance of the product is very small. Positioningremote listeningvoiceactivated callback. Specifications Product Name Tracking Device Material Plastic Color Black Network Type GSMGPRS Communication Frequency 85090018001900Mhz Charging Input Input AC110220V 5060Hz Working Voltage 3.44.2V DC Charging Output Output DC5.0V 500mA Storage Temperature 40 to 85 Operating Temperature 20 to 55 Epansion Card Mini TF Card Continuous Calls 150180min Humidity Range 595 noncondensing GPRS Upload60, TCPIP Product Weight 20g Product Size 422416mm Package Weight 34g Package Size 866cm Package List 1 Tracking Device 1 USB Cable 1 User Manual