The Marshall team are great if you have a question as well. Rain or shine. This is unfortunate because it is really in the range that makes the human voice sound a little muddy and undefined. However the sound on this is much better and will probably be his primary bluetooth speaker. But on my inflatable Red Paddle 14’27” they DO NOT hold at all. Despite heroic efforts by Anjelica Huston, Danny Glover, and Gene Hackman, falls flat. Will need to predrill before putting the screws in. And I have to say these fit in my ears better, sound quality is better and the charge lasts longer. DO NOT BUYYYYYY! Easy to move when loaded.