RCA L/R stereo audio switcher 4 IN 2 OUT or 2 IN 4 OUT. Suitable for multiple sources signal selection or multi-room paralleled amplifier or active speaker distribution of the same signal playback. Use audio rotary switch, lossless device, easily switch between different audio in or out. Stereo Switch Box with signal lossless, sturdy aluminum case, strong anti-interference, compact connector distributor RCA L/R stereo splitter boxes. Will not increase the sound or make the sound fade. Simply allows you to switch between RCA cables without interference. The audio splitter box has 4 audio source inputs and 2 outputs (4 in 2 out) or 2 inputs and 4 outputs (2 in 4 out), supporting bi-directional audio switching. The passive RCA switch has sturdy construction, all-metal housing, sleek appearance, and reasonable design. Simple operation, plug and play, easy to use, no external power required. Connect the RCA output cables of your different home audio equipment to the RCA inputs on the back of the device. Turn the knob on the front panel to switch between different audio sources easily. Color: Black Material: Aluminum alloy (housing), plastic (connector parts) Package Contents: 1 x Bi-Directional Audio Switcher Note: Light 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.