DVR:Audio and Video Input: 2-way composite video, PAL or NTSC format; BNC interface level: 1.0Vp-Impedance: 75; Audio: 2-way, ModelASP-801HCASP-801HDMain processor2- composite video, PAL or NTSC format; BNC interface level: 1.0Vp - Impedance: 75Ω; Audio: 2- group, RCA interface, linear input, Impedance: 1KΩCCD module1 group, composite video, PAL or NTSC format; BNC interface level: 1.0Vp-p, ...