ANRAN H.264 Network 960H Full D1 Motion Detection 4CH DVR CCTV Surveillance Security System Digital Video Recorder The 3-in-1 4ch security DVR currently supports 960H, AHD, and NVR. Supports Up to 4 High Resolution surveillance cctv cameras (not included) for Excellent Video Quality and Clarity. The surveillance DVR doesn't come with any hard drive (requires 3.5inch SATA internal port HDD, up to 4 TB) for continuous recording at 24/7 hours. 1280*1024 is the default resolution of the DVR. Video supports H.264 Compress mode. Easy operation interface, support VGA/HDMI video output, with 2PCS USB2.0 interfaces for mouse connection and U-Disk to backup video. Support 4ch real-time recording and playback at the same time. Smart phone uses free phone APP XMeye, and table PC monitor view it on IE browser. One Year Warranty and Lifetime Free Technical Support for the 4ch Security DVR