Compression model:H.264 Video quality: excellent in color, edge, Max channels:64ch Resources usage: view don抰 use CPU, u can decode 16ch in real time. 2 ratio: one for record, and one for transfer thru internet(now only for D1). Support OSD: Logo and field mask. Motion detection. I. HB1504 Video channel:4ch,120fps/card Audio channel:4ch Comperssion:H.264 hardware;high clear video quality,QCIF/CIF,40-180M/h/ch Software:Use Kingnow/OEM software Other features: 1. Powerful network function 2. Frames controllable 3. Support PTZ control from alarm card. 4. Super remote control function 5. OS: Win2k,WinXP