Internal dual lens, which makes it able to catch and shoot both of the front and back images. GPS module has been added to it, which can record the driving/travel track completely. The driving/travel track can be showed on the map by connecting Google map through Internet while you can watch the video on the computer by using the special accompanying software. Equipped with internal G-Sensor i.e. Gravity sensor, which may record the gravity sensing information and which may judge according to the up and down deviation, left and right deviation and front and back deviation of the vehicle. Continuous real time video without even one second of missed video, which makes your evidence being more reliable.