The MK2135 amplifier is a stereo professional power amplifier series product with a multi-channel design and integrated front and rear-grade amplifier functions. With the function of repeating, delay, and reverb effect processing functions, the product is equipped with three groups of stereo sound source inputs, one MP3 audio playback, five microphone inputs, two stereo line outputs, and four speaker interfaces. The volume of the 5 microphones can be controlled independently, and the microphone has a one-key switching of anti-howling and high and low pitch adjustment.