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 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 bi-directional switch; each output volume is independently controlled Share a single stereo source with minimal distortion at highest volumes; no audio crackle or signal loss when all four ports are connected Model: GV-AC004A Item: 4 Way Bi-Directional RCA Stereo Audio Switch Support: 2 In 4 Out / 4 In 2 Out System compatibility: 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 the color of the item in the picture to appear slightly different from the actual product. Measurement may vary by +/- 1-3cm