The SRSULT50B is a wireless Bluetooth speaker featuring Powerful bass and clear vocals wherever the party takes you. Featuring a rugged yet stylish design colourful lighting long battery life and adjustable shoulder-strap ULT FIELD 5 is a fun way to enjoy great sounding music almost anywhere. It has the ability to Combine two ULT FIELD 5 speakers wirelessly for wider stereo sound and also the Party Connect function to wirelessly connect up to 100 compatible speakers together.