Protection mechanism,Anti-reverse connection, undervoltage, overheating, overcurrent, short circuit protection The function of the fan,Lower the overall temperature of the module so that it does not get too hot. The higher the power supply voltage, the greater the output power, the smaller the horn impedance, and the greater the output power! When the audio signal input is large enough and the power supply voltage / current is large enough, there be enough output power! Product Name: 2.0 channel Bluetooth audio amplifier module Product Model:-1602T Bluetooth version: 5.0 (unobstructed, 10 meters) Input method: AUX + Bluetooth + USB (touch wheel button to switch modes and songs) Number of channels: 2.0 channels (left channel + right channel) Amplifier chip: TDA7498E Power supply: DC 15-36V (undervoltage protection below 9V, also supports 12V power supply) Applicable speakers: 30-200W, 4-80 Output power: Left and right channels less than equal 160W The product appearance and printed words depending on the batch, but this does not affect use Colour:As Shown Material:PCB+Metal Package Contents: 1set x assembly accessories Only the above package content, other products are not included. 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.