Factory direct sales 4CH H.264 Surveillance Security CCTV Standalone DVR System 1, H.264 4ch security DVR 2,3G Mobile monitor Factory direct sales 4CH H.264 Surveillance Security CCTV Standalone DVR System GS7604AD Product Features: 1. Adopts the standard Main profile H.264 compression technology,D1 and CIF can be adjusted, supports 4ch recording, Network transmission, and playback simultaneously ...