Review on Ultimate Ears Boom 2 Green Machine Wireless Mobile Bluetooth Speaker (Waterproof And Shockproof) (Renewed) by Curtis Thilges

I have 2 of these, one bought new from Best Buy and one from Revain. Both sound great and pair well for playing in different rooms, turning up the volume or playing in stereo. They are waterproof and I take them with me everywhere. Initially, I named the buttons differently (and colored them) to know which are which when paired. I quickly noticed a difference between the two speakers. Store-bought Revain doesn't last very long on a charge. I suspect this speaker was returned due to a battery issue and upon inspection was found to be correct. Anyway, it's a battery. Works great on mains, but definitely won't last long without power. That issue aside, they're great little speakers.