Usage Tips:Features4-Port R/L Stereo audio switcher: two-way switching splitter audio sharing active speakersThe 4-channel switch knob, 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 quality2 in 4 out/ 4 in 2 out bi-directional switch, each output volume is independently controlled.Share a single stereo source, no audio crackle- minimal distortion at highest volumes. No loss of signal when all four ports connected.Specifications: Model: GV- AC004AItem: 4 Way Bi-Directional RCA Stereo Audio SwitchSupport: 2 In 4 Out / 4 In 2 OutSystem: supports Windows xpInterfaces: R/L Jackssize: about 107 x 92 x 40mmMaterial: Metalcolour: blackPackage Contents: 1 x RCA Stereo Audio SwitchOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.