Its a 2 way acoustic system that incorporates a 6.5" transducer and one 1" tweeter. The system is self-amplified by 20W amplifier located on the rear part. It integrates a SD/USB interface for external files, FM radio and Bluetooth connectivity. Also incorporates a MIC/LINE input and a wireless receptor on the VHF band (a hand microphone also included), 2 tone control and internal and totally configurable ECHO effect. The MAM 50 integrates a rechargable battery that allows to carry with it and play for hours with the system. The device is made of ABS plastic with a metallic grill.