RCA L/R stereo audio switcher 4 IN 2 OUT or 2 IN 4 OUT. Suitable for multiple source signal selection or multi-room paralleled amplifier or active speaker distribution for the same signal playback. Uses a specialized audio rotary switch, lossless device, easily switches between different audio inputs or outputs. Stereo switch box with signal lossless transmission, sturdy aluminum case, strong anti-interference, compact connector distributor RCA L/R stereo splitter box. Will not amplify sound or cause sound degradation. 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 a well-designed layout. Simple operation, plug and play, easy to use, no external power required. Connect the RCA output cables of your various home audio equipment to the RCA inputs on the back of the device. Turn the knob on the front panel to easily switch between different audio sources. Color: Black Material: Plastic Package Contents: 1 x Bi-Directional Audio Switcher Note: Light shooting and different displays may cause the color of the item in the picture to differ slightly from the actual item. Measurement allowance is +/- 1-3 cm.