4-Port R/L Stereo Audio Switcher: Two-way switching splitter for audio sharing with active speakers. The 4-channel switch knob completely isolates circuits, ensuring each signal remains unaffected by the other three channels. Plug and play; no external power supply required; no impact on sound quality. Supports 2 in 4 out / 4 in 2 out bi-directional switching, with each output volume independently controlled. Share a single stereo source with minimal distortion at highest volumes. No loss of signal when all four ports are connected. Specifications: Model: GV-AC004A Item: 4 Way Bi-Directional RCA Stereo Audio Switch Support: 2 In 4 Out / 4 In 2 Out System: Supports Windows XP Interfaces: R/L Jacks Size: Approximately 107 x 92 x 40mm Material: Metal Color: Black Package Contents: 1 x RCA Stereo Audio Switch Note: Light reflection and different displays may cause slight color variations between the item in the picture and the actual product. Measurement allowance is +/- 1-3cm.