Sandals fit perfectly. My dads feet are badly swollen (read "HUGE") due to congestive heart failure, and his skin is quite fragile, so shoes are no longer an option. So I took this to work for my coworkers to use. Feels: Not very comfortable on my feet, the band is a little too tight, I guess my feet are to ?tall? :(Will return it. you can connect it to any device with a 3. My husband has one for his office and loved it . The battery life is pretty good have only charged them once since Ive had them, and i used them first time for around 4 hours straight out the box. Plenty sturdy enough for your shoes, especially flat bottom mens shoes. Theres not even the FOAM WINDSCREEN in the package. for me that is great for all day errands and the like, I ordered a 9 1/2 for long walks and gym high intensity workouts .