The smart case fits perfect in the case with and without AirPods max. My wife pulled a "Debo" when it was first delivered. They come in 5 different colors which are great for us . Clip it to my scrubs for work or my lunch bag or backpack and im good to go. Yeaaaaa! -The video also shows the sound at 50% and at max volume. First day wearing them and was worried as the first day blisters and feels like I wearing socks they are so nice! I bought congac color. I am a longtime lover of Birkenstocks and am always looking for a new twist. I have used it listening to music for 5 runs/30 some miles, probably total 6 or longer hours continuous use, it still has power left.