full d1 dvr support all PTZ protocol Support eight 2TB Hard disks Support 1280*1024 VGA High Definition output GT-DVR2016D 16 Channel Real time Full D1 DVR Product Introduce: The serial of DVR include 4 channels, 8 channels and 16 channels, that is D1 resolution digital video recording DVR, which have local recording, playback, support triple code remote network surveillance, data backup, ...