Features Specifications:Sell 16 Chs Realtime H. 264 DVR Card HK-Ds4016hs  83DB, Linear Electrical Level, 1000Ic)  - Preview Resolution:  Resolution: 704*576 (PAL) , 704*480 (NTSC)  - Video Compression: H. 264, Support CBR, VBR;  - Frame: 25F / s (PAL) , 30f / s (NTSC)  - Output: 32kbps-1000kbps (CIF)  - Compression Resolution:  CIF: 352*288 (PAL) , 352*240 (NTSC)  QCIF: 176*144 (PAL) , 176*120 (NTSC)  - Audio Compression: OggVorbis, Sample ratio is 16KHz, Output ratio is 16kbps - Power Consumption: Less than4. 5w - Working Temperature: -10 C --+ 50 C  - Working Humidity: 10% --90%