That being said, it was really painful at first but even after the first try your legs get use to it. While I cant yet speak for battery life, Ive been using it for about half a day on the charge that came out of the box, and connection is still strong and responsive. They were easy to pair with my phone - simply turn on the ear buds and as soon as you take them out of the storing case, the device is identified. 2nd EDITED COMMENT:The wheels are fine if the Seller replaces bearings. But as others have noted very small! The preset colors work well for my needs. One of the better $25 Ive spent for sure. Battery life is very good at ~30 hours. They do not run small. They installed just fine.