Format: PAL/NTSC Resolution: 640 x 480 (NTSC), 352 x 288/704 x 576 (PAL) Maximum Frame Rate Per Channel: 25fps (PAL), 30ftp (NTSC) Screen Set: Resolution 1024 x 768, Color Quality 16 Bits or 32 Bits Compression Code Rate: 50kbps - 1.2Mbps Data Format: MPEG4 System Requirements: P4 1.7GHz CPU or Above, 80G HDD and 256MB RAM, or Above VGA Card with 64MB Memory Windows 2000/XP/Vista,Microsoft DirectX 9.0 or Above One Available USB 2.0 Port Frame Play & Image Capture: Support advance search mode. Users can search by date/time, camera, record mode, and random combination of the three methods Support recorded files backup, delete by date/time, camera Convenient to extend system functions by software upgrade CPU and storage resources saving by advanced technology Remote surveillance and P.T.Z control through LAN, intranet, and internet Support alarm pre-record Support buzzer, email alarm out Can greatly decrease fragmented files while using NTFS partition User-friendly graphical user interface Fashionable design and streamlined appearance gives you a beautiful enjoyment Package Included: 1 x 4 Channel USB DVR 1 x USB Connection Cable 1 x Software & Driver CD 1 x 15m Cable. 0.5kg/pcs.