RCA lotus interface multi-channel audio source input mixed output audio switch-free (4-input ,2-output ) drive headset. (One 3.5mm stereo interface, four groups of RCA interfaces, one group of RA outputs, and one 3.5mm headphone output;) Can connect several audio sources at the same time without affecting each other, and can be mixed or output separately; Power supply DC 5-19V, it is best to use linear power supply, switching power supply is easy to produce AC sound; With gain, the RCA output port is about 2 times, and the headphone port is about 4 times. When you have multiple audio devices that need to share the sound or amplifier, several devices can be connected at the same time, which output is used, which is convenient and practical without switching. Input and output are stereo. RCA interface multi-channel simultaneous input and output. Function: mixing. colour:black Material:plastic 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.