While its impossible to have headphones not move at all while youre running, these come pretty damn close. purchaser, be sure to research and use one of the hanging techniques that other customers have come up with to deal with the issue and achieve a solid, reliable anchor that will safely hold the weight of your bike. Although the size said 3-4 I would say they are more a 4 than a 3. The sound quality, bass rhythms are impressive. The wooden hook itself is beautiful and modern. ? It also can play FM radio and music from a micro SD card (I havent tried those). One literally looked like it was engraved and stamped, but partially crooked and faded. Nice shoes for Pickleball etc! I guess Apple has made their aipods incompatible with knockoff devices, forcing you to buy their own products. The batteries never fully charged after an overnight and all day connected to the charger.