This product is not a professional sports earbud, and there is a risk of being thrown out during intense sports. It is not recommended that you wear earbuds during intense sports. If the earbuds are unstable or easy to fall off when wearing them normally, please operate in the following ways:
a) Please wear the earbuds correctly, earbuds are marked with "R", "L". "R" stands for right, "L" stands for left.
b) You can try to slightly adjust the wearing angle of the earbuds or the depth of insertion into the ear canal to improve it, so as to ensure that the earbuds fit the ear canal.
c) Choose the suitable ear cap, S/M/L, you can choose different size for the right and left ears.