Features: 2-IN-4-OUT Audio selector, the input can be connected to 2 amplifiers, and the output has 4 interfaces, which can be connected to speakers. The panel has Push-Button input and output switching buttons, manual switching, stable sound without interference; no need to plug in, easy to use and save energy. There is a non- pad at the bottom to protect your desktop; using audio equipment with a switch can avoid the wear and tear of the interface caused by plugging and plugging, and prolong the service life of the audio equipment. Parameters: Audio input: Speaker jacksx2 Audio output: Speaker jacks x4 Material: plastic+metal colour: Black+red Package Contents: 1 x Speaker Selector Box Only 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.