Features: Easy installation and simple operation. 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. Super small size: 78 * 50 * 20 mm / 3 * 2 * 0.79 in. 2(1)-in-1(2)-Out RCA Stereo： Audio Switch Audio Switcher, R/L Stereo Audio Switch Audio Switcher AB Switcher, R/L Stereo Audio Switch Splitter 2 x 1/1 x 2, with Mute Button and No External Power Required. 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: ① Select audio input between 1 and 2 with 1/2 switcher and get one output; ② Select audio output between 1 and 2 to receive one input; How to use: ① Connect two audio sources (like CD player/computer) to 1/2 ports and one audio output (like speakers) to IN/OUT port; ② Connect one audio source to IN/OUT port and two audio outputs to 1/2 port; Specifications: Application: Computer, Microphone, Monitor, DVD Player, Projector, Television Type: Audio Line Connector-B: RCA Connector-A: RCA Model Number: Audio Bi-Directional Switcher Gender: Female-Female Package includes: 1* L / R Stereo Audio Bi-Directional Switcher 1* L / R stereo cable（1.5m） 1* User manual