Careful with sand as it can get a little annoying. I tested the GPS with another phone and a 3 mile run was just as accurate as the phone. Working on simplifying & wanted nice earrings I could leave in while I slept, showered, swam, hiked, exercised, etc and got these. Battery life is good charge time slightly longer than average. Fits well and looks great. BT range is 33ft which I expect to be little longer as its BT 5. I think it?s their wide headband that accounts for this. Very good quality, very nice material. They are loud like a fat tire and of course make the flippity flop sound we all love. really love it, fits perrfectly and im happy