1. H.264 Standalone DVR 2. Support SATA HardDisk,Mouse,USB*2, ... 3. Audio, RS485, IE browse,15 languages 4.HDD,alarm H.264 main profile compression algorithm ideal for standalone DVR 4 ... & exact search(accurate to second)Storage & BackupSpace OccupationAudio 28.8MB/H ;Video 25-450 MB/HRecord StorageLocal Hard disk and NetworkBackup ...