Sena RUMBA User Manual page 7

1 ABOUT THE RUMBA BLUETOOTH
4. After removing the chinstrap pad, adjust the chinstrap tension at
the buckle so the chinstrap is tight and comfortable by pulling the
chinstrap end through the buckle to either tighten or loosen as
needed.
Chinstrap Pad
Chinstrap
5. Secure the excess strap with the "O-Ring" and then attach the
"Chinstrap Pad".
Note: Check the chinstrap's position and tension regularly to
ensure proper fit.
6. Turn the retention system knob clockwise to tighten or
counterclockwise to loosen.
WARNING: For maximum protection, this helmet must be fitted
and attached properly to the wearer's head in accordance with the
following instructions. If after adjustment the helmet does not fit
properly, do not use the helmet. Return it to the retailer or Sena.
MULTI-SPORT HELMET
®
Retention System Knob
RUMBA Bluetooth Multi-sport Helmet | 7
Strap Adjuster
Buckle
O-Ring