Also nice for setting up tubeless tires. This IS NO pushover for sure. Battery lasts about 5 hours of music, less when used for communication. The only thing I dont like from these sandals is the squeaky sound they make as you walk in flat and smooth surfaces. En cuanto a la sincronización bluetooth, lo he probado con distintos dispositivos y ha sido rápida y eficaz, no puede ser más sencilla. EDIT:They sent me "an upgraded version to solve the adhesive problem" in the mail, which arrived yesterday. Sound is clear and crisp. But this was resolved by tightening the hex screw in the handle. I just got them today so theyre not broken in at all. Hot Dryer Cycle where they fell out of the pocket and banged around for more than 40 minutes.