The UA3 boasts a powerful amplifier, of 300W. Although it’s not battery powered, it’s easy to move from room to room or even outside the house. The all-in-one design of the UA3 provides multimedia capabilities with Bluetooth connectivity and a USB port for linking to audio from a smartphone, tablet or other device.The system allows users to play music from a variety of sources, including Bluetooth, USB, CD and radio, and adjust sound with its Local Preset Equalizer.