Plantronics BackBeat GO User Manual page 4

TRY IT ON
The right fit = the best audio:
For the best sound performance and a secure,
comfortable fit, be sure to adjust the earbuds
to rest gently in your ear and drape around
the back of your neck. Use the provided fit kit
to find the eartip that works best for you.
For additional support, place the optional
stabiliser behind the eartip.
The loop of the stabiliser will fit snugly into
the back area of your ear.
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