1. H.264 Standalone DVR 2. Support SATA HardDisk,Mouse,USB*2,network 3. Audio, ... alarm, Raid functionPowerful network software:built-in web server,multi-DVR client &SMS Networking access for remote live viewing,recording,playback ... (highly)Weight2.38KG 4CH Full D1 Real Time H.264 CCTV DVR