... live, recording, playback, backup & remote accessVideo inputSupport 4 channel D1, 720P and 1080P inputDisplayHD output: VGA port*1, ... -4M, D1- 2MAudio codingIMA-ADPCM/G.711/G.726AudioSingle channel, talkback, RCA port outputControl interfaceSupport mouse,controller, keyboard control ... (4-ch1080p/720p/4D1) ; Fast play, slow down/ single frame/ rewind, Max 16x playback speedBackupFlash drive/ USB HDD/ ...