Portable Bi-Directional Audio Switcher with Mute Button Features: Easy installation and straightforward operation. Simply press the mute button to silence the device, which is especially handy in certain situations. Plug-and-play design; no external power or additional software needed; maintains sound quality. Analog signal supports maximum input and output of 2V p-p. Input and output frequency range: 20Hz to 20KHz. Utilizes standard audio cables, with input transmission distance up to 8 meters and output distance also up to 8 meters. Compact and ultra-small size; easy to position and perfect for your desk or office. Super small dimensions: 78 * 50 * 20 mm / 3 * 2 * 0.79 in. 2(1)-in-1(2)-Out Audio Switcher This is a bidirectional switcher for left/right channel audio ports, perfect for users with multiple audio sources and outputs. Main functions: Switch audio input between two sources using the 1/2 switcher for one output; Switch audio output between two options to receive one input. How to use: Connect two audio sources (such as a CD player or computer) to the 1/2 ports and one audio output (like speakers) to the IN/OUT port; 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, Television Type: Audio Line Connector-B: RCA Connector-A: RCA Model Number: Audio Bi-Directional Switcher Gender: Female-Female Package includes: 1* Bi-Directional Audio Switcher 1* 1.5m RCA Stereo Cable 1* User Manual