Features: Easy installation and simple operation. Lightly press to mute the device; useful in specific situations. Plug and play; no power supply or additional software required; does not affect sound quality. Analog signal supports up to 2V p-p input and output. Input and output frequency range: 20Hz ~ 20kHz. Uses standard audio cable; input and output transmission distance up to 8 meters. Compact and mini size; easy to place, suitable for desktop and office use. Dimensions: 78 x 50 x 20 mm / 3 x 2 x 0.79 in. 2-in-1 or 1-in-2 RCA stereo audio switcher with mute button; no external power required. Bidirectional switcher for left/right stereo audio channels. Designed for users with multiple audio sources and outputs. Main functions: 1. Select between two audio inputs to get one output. 2. Select between two audio outputs to receive one input. How to use: 1. Connect two audio sources (e.g., CD player, computer) to input ports 1 and 2, and one audio output (e.g., speakers) to the IN/OUT port. 2. Connect one audio source to the IN/OUT port and two audio outputs to ports 1 and 2. Specifications: Application: Computer, microphone, monitor, DVD player, projector, television Type: Audio line Connector A: RCA Connector B: RCA Model Number: Audio Bi-Directional Switcher Gender: Female-Female Package includes: 1 x L/R Stereo Audio Bi-Directional Switcher 1 x L/R Stereo Cable (1.5m) 1 x User Manual