L/R stereo 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 of the same signal playback. Uses a rotary switch, lossless device, easily switch between different audio inputs or outputs. Stereo switch box with signal lossless transmission, sturdy aluminum case for strong anti-interference, compact connector distributor L/R stereo splitter boxes. Does not increase volume or cause sound to fade. Simply allows you to switch between cables without interference. The 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 switch has a sturdy construction, all-metal housing, sleek appearance, and reasonable design. Simple operation, plug and play, easy to use, no external power required. Connect the output cables of your different home audio equipment to the input on the back of the unit. Turn the knob on the front panel to switch between different audio sources easily. Color: Black Material: Aluminum alloy (housing), plastic (internal components) Package Contents: 1 x Bi-Directional Audio Switcher Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.