IDE interface, embedded Linux-based DVR system Four-channel video inputs DVR card Four-channel real time display and recording MPEG-4 S/W codec compression Supports Pelco-D, Pelco-P, VIDO, SAE, Dynacolor, Kalatel, Nicecam, Panasonic protocol Built-in H/W watchdog Video resolution: NTSC: 640 x 480, 320 x 240 PAL: 704 x 576, 352 x 288 Supports four pieces card in one system