This mixing amplifier is rated at 120V and 4-16 Ω speaker output are provided. There are 3 unbalanced microphones inputs and 3 aux inputs. Bass and treble controls are provided. This amplifier can be applied to different occasions, such as supermarket, classroom, etc. Extensive protection from short-circuit, overload and high temp is ensured. Automatic cooling system ensures the extreme quite sound system. In addition, it can be called pa system amplifier