We’ve designed the ONear 500 Bluetooth earphones so you can enjoy both stability and comfort when running to music. You’ll need to take a few steps to ensure they stay in place: ● It’s a good idea to spend a few minutes trying on the various ear bud sizes and select the one that stays in place the best. The difference in the three sizes (S/M/L) may only appear minimal, but this can make all the difference in terms of fit. ● Make sure that the wing tip fits snugly inside your ear. ● The wire should go over and then behind the ears, before being fastened in place using the red slider.