Input and output are RCA lotus interface, one set of two-channel audio input, five sets of two-channel output, can be connected to five power amplifiers or active speakers, with gain compensation 2 times amplification<br> The internal use of positive and negative power conversion circuit, the actual power supply is doubled, the operating voltage range is DC 5V-16V. A total of 6 chips are used, 1 chip is used as a gain boost, and 5 chips drive five groups respectively. Stereo output, low noise and high fidelity, long-term power on and stable work<br> Please use a low-ripple power supply for power supply, pay attention to the positive and negative poles, they will burn if they are connected reversely! The power interface 5.5x2.1 is positive and negative.<br> The volume of each group is controlled separately, and the gain compensation is about 2 times (6DB)<br> Size: 11.8x7.5x4.5cm<br> colour: black<br> Material: metal<br> Package Contents:<br> 1 x Stereo Audio Mixer<br> Only the above package content, other products are not included.<br> Note: Light shooting 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.