1.H.264 Real time 4ch DVR 2.3G mobile monitoring 3.1 pc of 2T HDD ,multi ... Blank, Sensor Input, Full Disk Space E-mail sendingYes 3G MobileYes Network Mode10/ 100M adaptive, support LAN,WAN and ADSL ... , PTZ, camera control Backup ModeSupport CD-RW, DVD-RW, USB, Network Backup Compression StandardH.264 Hard DiskOne large hard drives ... Box of DVR Full D1 Economical Pentaplex DVR with 3G Mobile Functions