The Edison Professional Portable Boom box Speaker is a high-powered rechargeable speaker system that boasts two 40 watt RMS outputs. It is packed with features including wireless Bluetooth functionality and NCF for use with compatible devices, a USB input for MP3 playback, as well as USB mixed recording with a backing track and an echo effect. No matter where you go, you can take along your favorite tunes and a FM radio with preset stations means you'll never miss your favorite team's game. A microphone/guitar input makes for convenient guitar and vocal practice here, there or anywhere. Plus it runs on a rechargeable battery, comes with an AC adapter and features a AUX-in function for external sources to be connected and played through the speaker system.