1. 4-CH real-time recording 2. 1TB Hard disk 3. 2-ch audio input,1-ch audio output 4. H. 264 ... , alarm recording, manual recording, etc. for freely optional.4. 1TB Hard disk for storing video files.5. Compact design, waterproof and dustproof ... \ UDP \ SPI \ HTTP, etc.5.Memory Capacity500M—1T Sata hard disc (2.5inch)6.Recording ModeVideo file formatMP4Booting recording, time recording, alarm recording ...