5
instructions for proper fitting.
A1: Frequency (Hz)
A2: Mean Attenuation (dB)
A3: Standard Deviation (dB)
Example:
1. The surrounding noise level measured
at the ear is 100 dB.
2. The NRR of ISOtunes® FREE 2.0 is
25 dB
.
3. The noise level entering the ear is
approximately equal to
75 dB
.
Please note that the NRR is based on
the attenuation of continuous noise and
may not be an accurate indicator of the
protection attainable against impulsive
noise, such as gunfire.
EN 352
B1: Frequency (Hz)
B2: Mean Attenuation (dB)
B3: Standard Deviation (dB)
B4: Assumed Protection Value (APV) (dB
H = Hearing protection estimation for high
frequency sounds (f ≥ 2000Hz)
M = Hearing protection estimation for
medium frequency sounds (500 Hz <
f < 2000Hz)
L = Hearing protection estimation for low
frequency sounds (f ≤ 500Hz)
SafeMax™ Technology
ISOtunes® FREE 2.0 incorporates SafeMax™
Technology, therefore its volume output has
been limited to 85 decibels (IT-73 & IT-74),
or 79 decibels (IT-72) . ISOtunes® devices
with SafeMax™ Technology are OSHA and
ANSI compliant.
Cleaning and Maintenance
• Clean your ISOtunes FREE 2.0 by gently wiping
them with a clean, damp cloth with mild soap.
• Do not immerse the earbuds in water.
• Do not use abrasive cleaning solvents to clean
the earbuds.
If the earbuds get wet from sweat or rain, please
discontinue use and allow them to dry.
WARNINGS
ISOtunes® FREE 2.0 does an excellent job of
blocking outside noise. As such, ISOtunes®
FREE 2.0 should NOT be used in environments
where users need to be fully aware of their
surroundings for personal safety reasons. For
example, do NOT use them while driving a car or
riding a motorcycle. Similarly, do NOT use them
when riding a bicycle outside. The user is solely
responsible for ensuring that ISOtunes® FREE
2.0 is used ONLY in safe environments.
Additional Notes
ISOtunes
®
FREE 2.0 is compliant with Bluetooth
®
V5.2. We do not guarantee compatibility of all
functions on every Bluetooth
®
-enabled device.
Please check your device’s user manual for
compatibility and functionality.
For additional information or questions about
ISOtunes® products or spares and accessories,
please contact our support team.
FCC
Caution: The user is cautioned that changes or
modifications not expressly approved by the
party responsible for compliance could void the
users’ authority to operate the equipment.
This device complies with Part 15 of the FCC
Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any
interference received, including interference
that may cause undesired operation.
UK & Europe
North America
1-844-396-3737
Monday-Friday 9-5 ET
XXXX
EN
FCC ID: 2AJRDIT-72
