Watchman DVRs is a wide angle rearview mirror with visible area of 300mm. Furthermore, its equipped with DVR module, which can start loop recording when vehicle engine is turned on. The DVR module has high quality image sensor and lens to record image with up to 1280*720 video resolution at 30 fps, and provide clear videos both day and night. Moreover, it has built-in Lithium battery to serve as backup power such that the module can keep on recording for a period of time when vehicle power is shut down.