GF 21 Locator High-Definition Microphone Car Tracker.

[Easy To Use] - All you need is a working SIM card (Attention:Sim is not included) to insert into the car tracker, NO installation required, then you can track and map (with for Google Maps) in real-time over the Internet. [Real-Time Positioning] - Dial SIM card number, then you can hear voice around this tracker, with no light and no noise, you can monitoring what's going on around the tracker device silently and secretly.