Description: The RCA Switcher support 8-channel stereo mixing inputs, each with independent volume adjustment switches. 2 channel of stereo signal selection switch output, the volume will drop -12dB after mixing, need to connect amplifiers, preamps, mixers, or active speakers. It is used to expand the device interface to control tuning, mixing instruments, CD players, tape players, computers, mobile phones, , etc. Plug and play, the switching signal is stable, and there will be no interference or noise between channels, no loss of input and output signals, so you can enjoy a different listening experience. Compact design, sturdy metal housing, easy to install, and the product does not require an external power supply. Specification: Model: B066 Material: metal Interface: RCA interface Power supply: no external power supply, plug and play 8 groups of stereo inputs with independent volume adjustment 2 groups of stereo output with switch switch output (2 select 1 output) Input Impedance: 10K-47K Ohm Output Impedance: 2.5K-10K Ohm Output gain: -12dB Product size: lengthxwidthxheight 172x68x38mm/6.77x2.68x1.50inch Package Includes: 1 Piece Amplifier Speaker Switch Switcher Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!