Here are the steps:
1) Liberty 3 Pro comes with 4 sizes of ear wings and ear tips. The sizes are: XS(0), S(1), M(2), L(3), and the earbuds come with M(2) ear wings already attached.
2) Select and install the ear tips before using for the first time. We recommend starting with size M(2).
3) Put Liberty 3 Pro in your ears and twist to lock into place. Make sure the ear wings are wedged into the ridge of your ear.
4) Try on different sizes of ear tips and ear wings until you find a combination which delivers a tight seal and snug fit. You may want to use different sizes of ear tips and ear wings in your left and right ears.
5) If you're still not sure about the fit, take the Fit Test in the Soundcore app.
You can also click on the following link to learn how to get a proper fit:
If you have additional questions, please contact us at service@soundcore.com for further assistance.
