This amplifier plate adopts the official standard circuit design, chip selection USES is the United States imported original Long Ding micro class D power amplifier chip.This chip is strong not strong you can go to check its information.Good product chip share and the vast number of music lovers, this is our consistent principle!The power amplifier has a high efficiency, large power, in the case of the 12 v power supply can output 10 w + 10 w power, chip without heat sink, also have overheated, over-current protection function, such as function is very powerful, so to speak.This board with functions of switch, the SW nipple, will shut down power amplifier.