Awolf Dual Lens Dash Cam,2.7" Car DVR Vehicle Camera Video Recorder Car Camera with GPS Module G-Sensor [DUAL LENS]:Awolf car camera dash cam front and back, the front lens with wide angle of 140 degree can be rotated up and down 20 degrees, so that it can be adjusted for best view angle. And the back lens is with wide angle of 120 degrees. [GPS MODULE]:Dash camera double lens,GPS function on this camera is mainly for recording track and speed of your driving.You need to download google map in your PC first, and then it will automatically update the position when you play back video. [BUILT-IN G-SENSOR]:Awolf dash cam hd front and rear,capable of saving and locking the video recording data automatically in case of collisions. [LOOP RECORDING]:Awolf dashboard cameras has Automatic loop recording with the earliest unlocked video clip being overwritten by latest one when card gets full. It is a cycle recording of 119MB per video. Due to its own proprietary software, you just can see capacity of your TF Card is 119MB on computer, even if you have formatted your card. In fact, it does use the full capacity and format the card successfully. [EASY INSTALL]: dashcam,attach the suction cup to the windshield, just press the plastic button to lock it to the windshield. It can auto power on and start recording when the car turns on and stops when you switch off the engine. The battery capacity on the camera is small, if disconnected with power, it won't last long even if it's full of charge. You'd better plug the charger into the cigarette lighter when using.