... power; DVR can detect the short cut on VIDEO INPUT1/2/4 channel 6. VIDEO OUTPUT: 1channel, 1.0V,p-p,75Ω,BNC ... 7. VIDEO FORMAT: Support PAL/NTSC 8. VIDEO COMPRESSION: H.264 ... channel,500Ω,RCA 15. AUDIO LEVEL: 1V ~2V, p-p 16. AUDIO COMPRESSION: G.711 17. STORAGE: Hard drive, SD card,external ...