10.1" 720P DVR monitor with quad split screen,support 256G SD card. It including 4 pcs 720P camera, 1 front camera with 5M extension cable, 2 side camera with 10M extension cable, 1 rear camera with 20M extension cable. The popular 4 channel AHD DVR supports 4 channels real-time preview. It has built-in high performance image processing chip, H.265 video compression code and high compression ratio. All waterproof cameras come with excellent night vision. They can provide the driver with a very clear image whether it is day or night.