Usage Tips:Note: The power amplifier chip is ly upgraded to IRS2092S, which is the IRS2092. The adds temperature protection. The default is 60. There is a temperature adjustment switch on the bottom of the radiator to adjust the trigger temperature. The cooling fan is installed on the top to reduce the height, which is convenient for music lovers to install the case. Features: 45V to 80V input 1000W amplifier board 1000W IRS2092S + RIFP4227 x 2 high power digital power amp board note: Depending on the batch, the appearance of the electronic components on the board may be different from the picture, but the functions are the same and do not affect use. Material: PCB+electronic components+plastic+metal colour: Black Package Contents: 1 x 1000W Amp Board 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.