JBL Under Armour SPORT WIRELESS Mode D'emploi page 4

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2. ATTACH ENHANCERS
2.1 Gently clip the enhancer onto the earphone.
2.2 Align the notch, and gently clip the ear tip onto
the earphone.
2.3 Insert the earphones into your ear and twist
into place. Adjust for comfort.
For fit tips: http://underarmour.custhelp.com