H.264 main profile compression support 3G&WIFI and HDMI output 100/120fps recording for D1 4 channel playback simultaneously Support:Arabic,Czech ... ,1.0Vp-p,75Ω Video Output2 channel TV output BNC,1.0Vp-p,75Ω,1 VGA output Audio Input4 channel ,RCA, 200 ... 2800mV,30KΩ Audio Output1 channel ,RCA, 200-3000mV,5KΩ Alarm Input4 channel,programmable,ground,manual open/closed,Trigger recording,PTZ movement,tour ...