Technology allows video files to be compressed without any noticeable difference in quality. Multiple Recording/Playback ModesThe playback feature of this video recorder allows you to know the whole events, replay significant evidence or funny video records. You can quickly search for any event that happened at any time. Specification: Operating System: Embedded Linux System Menu Display: 1/4 Screen Video Code: H.265+ Main processor: Hi3520D V200 Record Resolution: Encode ability: 4*1080P (5 in 1) Decode ability: 4*1080P (5 in 1) 960P/720P Multi-mode input: Analog: 4*1080P (5 in 1); 4*720P; 4*960P Hybrid: 2*720P (analog)+2*720P (network) Network: 8*1080P; 12*960P; 8*720P; 4*1080P; 4*720P; 1*1080P Motion detection: Each screen can be set to 192 (16 * 12) detection areas; multi-level sensitivity can be set (Limited local channel) VGA Resolution: 1920*1080, 1440*900, 1280*1024, 1024*768, 1280*960 Video storage: HDD, network Backup mode: Network, USB hard disk, USB burner, SATA burner Wireless: 3G,WIFI (extend via USB) Signal System: PAL/NTSC Frame Rate: 1-30fps (NTSC), 1-25fps (PAL) HDD Supported: Support Up to 4T (The hard drive disk not included) OSD Language: English, French, German, Spanish, Italian, Japanese, etc Power supply: 12V/2A Item size: 25.4 * 21.2 * 4.1cm /10 * 8.35 * 1.61in (L * W * H) Item weight: Approx.661g /23.32oz Package size: 35 * 27.4 * 7.5cm /13.78 * 10.79 * 2.95in (L * W * H) Package weight: 1037g /36.58oz Package list: 1 * 4CH 1080P/960P/720P DVR Video Recorder (HDD not Included) 1 * Power Adapter 1 * USB Mouse 1 * Bag of Screws for HDD Installation 1 * English User Manual