RCA lotus interface multi-channel audio source input mixed output audio switch-free. Can connect 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 AC sound; With gain, the RCA output port is about 2 , and the headphone port is about 4 . When you have multiple audio devices that need to share the sound or amplifier, 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. : plastic colour: black Package Contents: 1 x Audio Switch Switcher 1 x cable 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.