Product Features: Small size and light weight, easy for carry. Black shell, easy to hide, perfect for tracking vehicles, teens, spouses, elderly persons or assets. With two powerful magnets inside, easy to attach to vehicle firmly, no extra installation need. All you need is a working SIM card (NOT included ) to insert into the device, then you can track and map (with Google Maps) in real-time over the Internet. Dial SIM card number, then you can hear voice around this tracker, with no light and no noise, you can be monitoring and spy what's going on around the tracker silently and secretly. Product Specification: Type: Magnetic GPS Locator Material: Plastic Color: Black Dimension: 35x20x14mm Talk Time: 150 - 180 minutes Working Time: 4 - 6 days Expansion Card: Mini TF card Network: GSM/GPRS GSM Band: 850/900/1800/1900Mhz GMS Locating Time: 25 Seconds Power Input: AC 110-220V 50/60Hz Power Output: DC5V 300 - 500mA Battery Capacity: 3.7V 400mAh Li-ion Battery Working Voltage: 3.4 - 4.2V DC Storage Temp.: -40 to 85 Celsius Operation Temp.: -20 to 55 Celsius Humidity: 5%-95% non-condensing Warning: Must insert SIM card before charging. Package Includes 1 x Mini Tracker 1 x USB Cable 1 x User Manual