Key Specifications/Special Features: H.264 hardware compression algorithm for high compression ratio and excellent image quality 8 channels CIF or 2/4 channels 4CIF(D1) real time recoding and dual encoding stream supported, also support 8/16 channels 4CIF(D1)/2CIF/HD1 non real time recoding (VEC0804LCN without audio encoding) Supports 4CIF/CIF/QCIF real time preview for up to 64 cameras Video detection supports motion detection, video loss and video block Supports OSD/LOGO overlay, privacy masking, frame rate and bit rate dynamically adjusted Provide full SDK with Windows and Linux operation system Compatible with full range of Dahua’s compression card