HJC SMART 21B User Manual page 16

2 INSTALLING THE HEADSET ON YOUR HELMET
2.1.10 Modular Chin Bar / Open & Full Face Visor Closing
1. Lower the chin-bar of the modular helmet or the shield visor of the
open face helmet completely.
Modular Helmet
2. Make sure that the Wired Boom Microphone is a proper distance
from your mouth when you wear the helmet.
or
SMART HJC 21B 2 Gen Standard Motorcycle Bluetooth
nd
Open Face Helmet
Communication System for HJC Helmets | 16
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