Features: Easy installation and easy to use. Just need light pressure to mute the sound; very useful in special conditions. Plug and play; No power supply and other software required; Does not affect the sound quality. Analog signal maximum support 2V pp 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 desk and office. Super small size: 78 * 50 * 20 mm / 3 * 2 * 0.79 inch. 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 bi-directional switcher for L / R channel audio ports. L / R Audio selector designed for customers who have multiple audio sources and outputs. Main functions: ① Select audio input between 1 and 2 with the 1/2 switch and get an output; ② Select audio output between 1 and 2 to receive an input; How to use: ① Connect two audio sources (such as CD player/computer) to the 1/2 ports and one audio output (such as speakers) to the IN/OUT port; ② Connect one audio source to the IN/OUT port and two audio outputs to the 1/2 port; Specifications: Application: Computer, Microphone, Monitor, DVD Player, Projector, TV 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