Double Camera Vehicle Camcorder Recorder 2.7in LCD Car DVR GPS G-Sensor R300 Ultra small volume; the front lens with ultra wide angle of 140 degrees can be rotated up and down 20 degrees; the back lens with ultra wide-angle of 120 degrees high resolution; this perfect modular design is more convenient for various angle and high resolution video shooting. Built-in 1/4 inch low-noise and high-quality photographic element can capture ultra clear picture in a dark place. Built-in lithium battery with charging and meanwhile recording function. With a delayed start function to prevent transient pulse current damage machine at the moment the vehicle start. GPS scanning and positioning. Gravity induced SENSOR Specification Lens Front lens with ultra wide angle of 140 degrees; back lens with ultra wide-angle of 120 degrees Microphone / speaker Built-in Television output NTSC/PAL TV output and DC access 5V 500MA Battery Built-in lithium polymer battery System requirement Windows 2000/XP/Vista/Windows 7,MAC OS x above 10.3.6 Package: 1 x Car DVR 1 x Rear Camera 1 x Car Charger 1 x Mounting Holder 1 x User Manual 1 x GPS Module