<p>Adapted power supply: The working voltage range is 12-30VDC, and it is recommended to use a DC power supply with a</p> <p>voltage of 24V-28V and a current of 10A or above.</p> <p>Protection mechanism: Input undervoltage, input anti reverse connection, overheating, overcurrent, short circuit protection.</p> <p>Product name: 2.1 channel Qualcomm BT Amplifier Board 100W+100W+200W</p> <p>Product model: -APTX1</p> <p>Maximum power: Left or right channel- 105W@30V , 4; 55W@30V , 8. Subwoofer- 208W@30V 2; 105W@30V , 4.</p> <p>In short, the higher the voltage, the smaller the resistance, and the greater the output power.</p> <p>Adapted speakers: Left and right channels, supporting 3-8 ohms and speakers up to 100W; The subwoofer supports 2-8</p> <p>ohms and speakers up to 200W.</p> <p>BT chip: QCC3034, transmission distance of 15 meters.</p> <p>Input : BT+AUX, BT priority, BT needs to be disconnected when using audio cable input.</p> <p>Number of channels: 2.1, Left and right channels+subwoofer</p> <p>Power amplifier chip: Two TI TPA3221</p> <p>type: A-without shell</p> <p>Material: plastic</p> <p>colour: Black</p> <p>Package Contents: </p> <p>1 x 2.1 channel Qualcomm BT Amplifier Board</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>