When you have multiple audio devices that need to share audio or power amplifiers, several devices can be connected to it at the same 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 Several audio sources can be connected at the same time without affecting each other, and can be mixed or individually output Power supply DC 5-19V, please use low-ripple power supply, poor power supply will easily produce hum With gain, the RCA output port is amplified by about 2 times, and the headphone port is amplified by about 4 times. 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 cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.