Product model: XY-S220H<br> Power supply: above DC12-38V/10A<br> Bluetooth-compatible version: 5.1<br> Audio channel: 2.1 channels<br> Audio input: Bluetooth-compatible + AUX + USB flash disk + USB sound card<br> Audio output: left and right channels + subwoofer<br> Frequency range: 20Hz -- 20KHz<br> Volume adjustment: high-end encoder knob adjustment, smooth feel<br> Maximum output power of left and right channels:<br> 180W/3 ohm--36VDC<br> 80W/8 ohm--36VDC<br> Maximum output power of subwoofer:<br> 220W/3 ohm--36VDC<br> 160W/4 ohm-36VDC<br> Protection mechanism: overvoltage, undervoltage, clipping, short circuit, overheating and other protection<br> Unique functions: support sinlink app, modify Bluetooth-compatible name, set Bluetooth-compatible password, and turn off / on prompt tone<br> Colour: black<br> Material: plastic<br> Size: about 134x126x26mm<br> Package Contents:<br> 1 * Bluetooth power amplifier board module<br> Only the above package content, other products are not included.<br> 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.