With a specific design for digital music playback, the mvh-s120use connects directly to your android smartphone and other devices via aux-in inputs on the front panel, so you can listen to your favorite songs while charging the battery (only charges through the USB input); or you can tune in one of 24 digital FM radio stations to add even more hours of music; this small chassis stereo system works with all the authenticity and Powerful 4 x 50 w mosfet technology and high-quality sound reproduction; and if you want even more power, you can use the rca output from the back of the unit to install an extra subwoofer or amplifier.