When you have multiple audio devices need to share audio or amplifiers, devices can be connected to it at the time, which output is used, and it is convenient and practical without switching. One 3.5mm stereo interface, four sets of RCA interface, one set of RA output, one 3.5mm headphone output audio sources can be connected at the time without affecting each other, and can be mixed or individually output supply DC 5-19V, please low-ripple supply, poor supply will easily produce With gain, the RCA output port is amplified by about 2 , and the headphone port is amplified by about 4 . colour: black Material: metal Size: 120x40x45mm Package Contents: 1 x Audio Switch Switcher Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.