HJC Smart 20B User Manual page 11

5. Then push the top of the unit to fix onto the speaker pocket of the
helmet.
[Once installed, the position of the speaker unit
can be adjusted to rider's ear position]
Note:
If your speakers are too close to your ears and your ears are uncomfortable,
you can attach a Foam Speaker Cover to the front of the speaker.
6. Repeat step 4 and 5 to install the left speaker.
Note:
Removing the Speaker
To remove the speaker, insert the Allen Wrench to the upper shorter hook
area then gently pull out the speaker unit.
SMART HJC 20B
11