ACEMILE THEATRE BOX C01-CBT612-BS0100407US 360&deg; 3D-Sound Portable Speakers, Ruby 360 degree surround sound, virtual 3D effect, you are in the "sweet spot" anywhere in the room 4.1 system (four 2 inch full range drivers, one 3 inch powered bass driver) delivers up to 125 watts of power Built-in microphone for hands-free calls (Bluetooth conference call) Connects via Bluetooth 4.0 and mobile devices with NFC or a 3.5mm stereo cable (included) Plays music up to 30 feet (10 meters) from any Bluetooth-enabled device such as your smartphone, notebook or tablet