CHOOSE AN EAR bud THAT fITS
When the ear bud fits properly, it should be sealed in your ear so that you feel a slight amount of resistance when you remove the headset from your ear.
Remove the headset from your ear.
Gently twist the ear bud while pulling it off the speaker post.
Press a different ear bud onto the speaker post with the stem side of the ear
bud facing downward.
TIP: Try using different size ear buds on the headset and stereo plug-in cable. Do not assume that you need the same size for both ears.
Plantronics Voyager 855