Dual Camera (1, 3M Pixel/2CH Display) Emergency & Continuous Reocrding, 2 Channel Digital Video Black Box with 2 Built-in Cameras and one optional external with embedded GPS Module & G-Sensor, Includes 4GB Micro SD, Compatible with up to 32GB, , Vehicle blackbox DVR, Records Audio and Video, 2 built-in 1, 3M pixel Camera + 1 external (compatible with Any BOYO back-up cameras), Built-in collision detection sensor for automatic record, Supports GPS & Google Map (Able to implement client MAP), Mounts onto windshield, Record onto SD Card, Protect recorded events by selecting disallow overwrite, 4GB Micro SDHC included SKU: MRTM7272