These Plena mixer amplifiers are high performance, professional public address units with modern state of the art features. The Bosch PLE-1ME120-US Plena Mixer Amplifier is a compact, yet powerful 120 watt amplifier and 4-channel mixer for providing background music and public address audio for commercial use, in offices or at home. An LED VU meter monitors the master output. A headphone socket, below the VU meter, provides the mixer output. For total reliability and ease of use, a limiter is integrated into the output stage to restrict output if the user applies too much signal. Overall the PLE-1ME120-US mixer amplifiers are easy to use, taking the complexity away from the user and putting it where it belongs, inside the equipment. Providing a crisp call or clear music is as easy as turning on the radio.