DVR 1.USB2.0, USB mouse USB backup,USB-RW ,USB ... 2.Support multiple-ch 3G, also support cottage phone 16CH DVR Recorder Feature:H.264 double stream, advanced and filtering techniques make streaming save ... detection >timerpalyback1ch,multi-chSearchtime,loglist,event, ChannelBackupHDD/SpaceAudio: 28.8M / h+Video: 25 ~ 450M / hStorgeHDD, WEBBackup modelWEB,USB,USB-RWPortVideo input4 ...