Utilizing Bluetooth EDR 2.1 technology, this ECOXGEAR ECOXBT GDI-EGBT500 speaker lets you listen to music stored on compatible Bluetooth-enabled devices from up to 32.8' away. The waterproof design guards the speaker against moisture damage.
I have a lot of hours on the speakers and several trips involving water and so far its great. Fast and easy to connect, long battery life especially if you are on lower volume, feels solid and well built. Great sound for size.