Input and output are RCA lotus interface, one set of two-channel audio input, sets of two-channel output, can be connected to amplifiers or speakers, with gain compensation 2 amplification; The internal of positive and negative conversion circuit, the actual supply is doubled, the operating voltage range is DC 5V-16V, and the Japanese company NJM4580 dual op amp is used. A of 6 are used, 1 chip is used as a gain boost, and 5 drive groups respectively. Stereo output, low noise and high fidelity, long-term on and stable work; Please a low-ripple supply for supply, pay attention to the positive and negative poles, they will burn if they are connected reversely The interface 5.5*2.1 is positive and negative. The volume of each group is controlled separately, and the gain compensation is about 2 (6DB) Working voltage: DC5-16V, with negative voltage conversion, the supply voltage is doubled and the dynamic range is . Material: Metal colour: black Package Contents: 1 x Audio Distributor Only the above package content, other products are not included. Note: Light reflection 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.