2pcs 2MP 1/2.8' high performance CMOS sensors HD resolution, the image is clear and delicate Support picture-in-picture display; 180° dual-lens camera with stitching images Support humanoid, intelligent functions (crossing-line detection, area detection, etc.) Multiple modes such as dual light alert, full color day and night, infrared night vision can be switched smoothly External storage SD card slot, up to 128G (not included)