Features 4-Port R/L Stereo Audio Switch: Two-way switching splitter audio sharing active speakers The 4-channel switch button completely isolates circuits, ensuring that each signal is not affected by the other three channels. Plug and play; no external power supply required; no impact on sound quality 2 in 4 out/ 4 in 2 out bidirectional switch, each output volume is controlled independently. Share a single stereo source, no sound crackling - minimal distortion at maximum volume. No signal loss when all four ports are connected. Specifications: Model: GV-AC004A Item: 4-way bidirectional RCA stereo audio switch Support: 2 in 4 out / 4 in 2 out System: supports Windows xp Interface: R/L jack Size: about 107 x 92 x 40 mm Material: Metal Color: black Package Contents: 1 x RCA Stereo Audio Switch Only the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.