... D1, support 3G Network:EVDO( CDMA2000),WCDMAVideo Input 1/2/4 channel composite video, PAL or NTSC BNC interface,1.0Vp-p ... :1-30 frames/secondVideo Bit rate32Kbps~16MbpsVideo Output 1 compound video, PAL or NTSC; BNC, level: 1.0Vp-p, impedance: ... 726, G711, ADPCMAudio Input1/2/4 channel, RCA port, liner input, Impedance:1KOhmsAudio Output1channel,RCA port, linear outputAudio talk-back input1 channel , ...