Manual AV Switch.Installation fast， easy operation.Eight inputs， One output.Apply to security or education and so on.Stronger anti- interference ability and Perfect stability.Video:Input Video Signal: 0.8-1.0 volts p-pInput Impedance: 75��Output Video Signal: 0.8-1.0 volts p-pOutput Impedance: 75��Bandwidth: 50Hz-5.5MHzAudio:Input Audio Signal: 2V(RMS)Input Impedance: 47K��Output Video Signal: 2V(RMS)Output Impedance: 1K��Frequency: 10Hz-20KHz， 0db8 Ports input (Left and Right Channels) and 1 Port output (Left and Right Channels)