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 maximum 2V p-p input and output. Input and output frequency range: 20Hz ~ 20kHz. Uses standard audio cable; input transmission distance up to 8 meters; 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 L/R stereo audio switcher. Designed for users with multiple audio sources and outputs. Main functions: Select between two audio inputs to get one output. Select between two audio outputs to receive one input. How to use: Connect two audio sources (e.g., CD player, computer) to the 1/2 ports and one audio output (e.g., speakers) to the IN/OUT port. Or connect one audio source to the IN/OUT port and two audio outputs to the 1/2 ports. 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 1.5m L/R Stereo Cable 1 x User Manual