The MA-212U is a 6-Input 120W mixer/amplifier with a built in digital portable media player that will playback MP3 / WMA / WAV audio files. The MA-U series offers input flexibility with its 6 flexible microphone and line level selectable inputs. Input options include 5 selectable microphone or line level, a telephone and a dual RCA sum-to-mono. The A front panel 1/8? mini-jack makes it easy to plug-in a portable music source. The MA-U series uses a Class D amplifier topology combined with a SMPS, Switch mode power supply for added energy efficiency in a compact size.