real time recording on all 4 channels,8 channels,16 channels. 1080P*4CH HD-SDI 4CH DVR CE, UL listed HD-3104HVideo Input/Output ... Playback resolution: 4x1080PHexaplex operation simultaneously: Preview, recording, playback, and network live, backup, playback1 RJ-45 Ethernet connector, Static, Dynamic IP ... , weight: 6.0kg 1080P*4CH, RS422, PTZ, Alarm, Network, 2 SATA HD, HDMI, VGA, USB Backup, USB Mouse ...