This mixing amplifier is rated at 250W and 4-16 Ω speaker outputs are provided. There are 4 unbalanced microphone inputs and 3 aux inputs. Bass and treble controls are provided. This amplifier can be applied to different occasions, such as supermarkets, classrooms, etc. Extensive protection from short-circuit, overload, and high temp is ensured. An automatic cooling system ensures a tranquil sound system. It's also called a mixer amp for short.