... DC power; DVR can detect the short cut on VIDEO INPUT1/2/4 channel 6. VIDEO OUTPUT: 1channel, 1.0V,p-p,75Ω,BNC ... ~ 3Mbps, 4 level video quality 12. AUDIO INPUT: 1/2/4 channel 13. AUDIO INPUT FORMAT: 20KΩ,RCA 14. AUDIO OUTPUT: 1 channel,500Ω,RCA 15. AUDIO LEVEL: 1V ... ~2V, p-p 16. AUDIO ...