Descriptions: Waterproof function without antenna type GNSS external power supply form built-in power interface text Chinese English type portable Rechargeable, strong magnetic adsorption, recordable, anti-lost positioning for elderly children. Features: 1. Small size and light weight, easy for carry. 2. Black shell, 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. 3. 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. 4. Dial SIM card number, then you can hear voice around this tracker, with no light and no noise, you can monitoring and see what's going on around the tracker silently and secretly. 5. Voice Recording Function: Send text message 555 to SIM card number, it will reply a message 'Snd' and start recording,SIM card and TF card are not included. Specifications: Color: black. Material: Plastic. Size(approx):35*20*14mm. GPS positioning accuracy: about 100m. Expansion Card: Mini TF card. Antenna Type: 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. Standby Current: About 2.5mA. Speaking Curret: About 150mA. Package Included: 1 x Mini Magnetic GPS Tracker(SIM card and TF card are not included). 1 x USB Charging Cable. 1 x English User Manual