MSA left/RIGHT Operating Manual page 3

1 Product
The MSA left/RIGHT series consists of a range of ear-muffs with a level-dependent facility designed to
improve safety and working conditions in noisy environments. It consists of the following versions:
Product name
All products are available with
headband or as a helmet
mounted version
left/RIGHT Wireless World
left/RIGHT Wireless World Dual
This manual is applicable for all versions. If a function is only available for certain versions, it is mentioned.
left/RIGHT Wireless World and left/RIGHT Wireless World Dual provide an entertainment audio facility. For
optimum comfort, fit and function of the product, it is important to read the instructions carefully and save
them for future reference.
WARNING!

To ensure proper hearing protection, the ear-muffs must be fitted, adjusted and maintained in accor-
dance with MSA's instructions. If these instructions are not adhered to, the protection afforded by the
ear muffs could be severly impaired.
 Do not disassemble the ear-muffs. If any unauthorized repair or modification has been carried out on
the device, warranty is no longer valid.
 left/RIGHT Wireless World and left/RIGHT Wireless World Dual have an entertainment audio facility.
The audibility of warning signals at a specific workplace may be impaired while using the entertainment
facility. These versions limit the entertainment audio signal to 82 dB(A) effective at the ear.
 Remember that hearing protectors may shut out external ambient sounds, such as warning shouts,
alarms and other important signals. The audibility of warning signals at a specific workplace may be
impaired while using the entertainment facility. The user must be especially attentive of the surround-
ings when wearing hearing protection.

Depending on the model, this ear-muff is provided with level-dependant attenuation and/or electrical
audio output. The wearer should check correct operation before use. If distortion or failure is detected,
the wearer should refer to the manufacturers advice for maintenance and replacement of the battery.
 Performance may deteriorate with battery usage. The battery life time varies depending on the mode
of use and volume output. The typical period of continuous use that can be expected from the ear-muff
battery is:
- Surround and Bluetooth active: approximately 30 h
- Surround only and Bluetooth inactive: approximately 350 h

The output of the level-dependent circuit of this hearing protector may exceed the external sound level.
The output of the electrical audio circuit of this hearing protector may exceed the daily limit sound level.
Refer to the attenuation table for further details on noise reduction. Make sure to select the correct product
for the application.
These models of ear-muffs have satisfied the optional requirements of thermal resistance at -20 °C and
+50 °C.
For details on how to operate the product and for a description of all functions of models
left/RIGHT Wireless World and left/RIGHT Wireless World Dual see additional manual PM260.
X X
X X X X
left/RIGHT
Product
Headband: 378g
Black
Helmet mounted:
395g
GB
3