This section uses car audio amplifier chip TDA7388, this chip is commonly used in high-end car amplification, in the sound quality and volume resolution performance is very superior after all, the voltage is only 12V,<br>built-in ultra-high-power mos tube, push each other to work, even if the load of 2 ohm speakers are no pressure, the front of the front if you configure the sound board can be configured to want to the high and low sound effects.<br>Power supply: DC12-18V, DC input or terminal<br>Input/Output: 50Wx4<br>Load: 2-8<br>Bluetooth: support 5.0 HD transmission, maximum distance 20 metres<br>Input: Bluetooth + AUX + USB<br>Heat dissipation: active natural cooling<br>Protection: Support over-voltage, over-current, overload, short circuit protection.<br>Due to different batches, there may be differences in product appearance and printed text, which not affect use<br>Colour:As Shown<br>Material:PCB<br>Package Contents:<br>1 x Audio Power Amplifier Board<br>Only the above package content, other products are not included.<br>Note: Light reflection 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.