This is an upgraded version of previous amplifier boards. This board contains heavy-duty circuits to give you the best experience. It helps you with amplifying the low-quality audio into a high and better quality sound. This board has 2N3055 transistors for heavy loads. The Input voltage for the board is 18-0-18. So, you need to connect a mini transformer and the board is ready to go. The board is fully customized. You won't face any type of difficulty in organizing this board. Please use a good type of speaker for a better experience.