... INPUT GPS NMEA.183 SUPPORT2.5 INCH HARD DRIVE HR4001 stand alone DVR , digital video recorderMAX 4 VIDEO INPUT,4AUDIO ... inDC, 8V~32VPower out12V, DC, Max Current 1AVideo input4/2/1 channels, 1.0Vp-p, 75Ω, BNCVideo output1 channelVideo ... 50HZ~350HZAudio output1 channelCompressionMPEG2Recording Mode704x576, 25fps(PAL), 30fps(NTSC)StorageSATA (2.5 inch)Alarm input4-ch Alarm InputAlarm output2-ch Alarm ...