... 75Ω,Support monochrome/color cameraVideo output: 1channel(PAL),PWL:1.0Vp-p,Impedance:75ΩAudio input: 2 channels, Linearity ... port,one for recording data back-up,another for sensor data,GPS data 1 SATA HDD port 1 infrared remote portInput/Output Port ... : 8channels switch input,1channel velocity sensor input,1channel alarm outputPower input: DC8-36V, ...