L / R Stereo Audio Bi-Directional Switcher This is a bidirectional switcher for L / R channel audio ports. L / R Audio selector designed for customers having several audio sources and outputs. Main functions: Select audio input between 1 and 2 with 1/2 switcher and get one output; Select audio output between 1 and 2 to receive one input; How to use: Connect two audio sources (like a CD player /computer) to 1/2 ports and one audio output (like speakers) to an IN/OUT port; Connect one audio source to the IN/OUT port and two audio outputs to the 1/2 port; Note: Select 1/2 switch to switch the input or output you want. Features: Easy installation and simple operation. You only need to lightly press to mute the device; very useful under special conditions. Plug and play; No power supply and other software required; Won't affect sound quality. Analog signal maximum support 2V p-p input and output. Input and output frequency range: 20Hz ~ 20KHz. Use standard audio cable, input transmission distance up to 8 meters, output transmission distance up to 8 meters. Compact and super mini size; Easy to place and suitable for your desktop and office. Size: 7.8*4.83*1.98cm Package contains: 1* L / R Stereo Audio Bi-Directional Switcher 1* L / R stereo cable 1* User manual