3M WORKTUNES CONNECT WIRELESS HEARING PROTECTOR
Basic Operations
Charging the Headset:
To comply with regulatory guidelines, your hearing protector has been shipped to you with only a partial charge on its integrated lithium-ion battery pack. To charge the hearing protector, insert the supplied micro-USB connector cable into the micro-USB jack is located on the bottom of the right cup of the hearing protector. Connect the other end of the cable to a suitable USB power source such as a computer or third-party certified (UL, Intertek, etc.) AC to USB wall adapter.
The LED will be blink blue while charging and change to solid blue when complete.
Fitting the Headset:
Fully extend sliders and place cups over ears. Then, tighten the headband using sliders.
Power and Volume:
Press and hold the power button for 3 seconds to power ON/OFF headset. Voice Assist will announce “Power ON” or “Power of.” Voice assist will also provide a battery status update – “Battery High,” “Battery Medium,” “Battery Low,” or “Battery Empty.” Adjust the volume using your connected device.
Low Battery Warning:
The hearing protector will also provide a “Battery Low” warning every 20 minutes when the battery voltage is low. An additional “Battery Empty” warning will occur as the hearing protector powers down. Recharge the unit at this time. 
Auto Shut-Off:
5 minutes after either Bluetooth® or the audio input is disconnected, the hearing protector will automatically power down.
After auto shut-off, press and hold the ON/OFF button for 3 seconds to turn back on. 
Bluetooth® Operation
Pairing the Device:
Once powered on, double-press the button on the hearing protector’s right cup to enter pairing mode. You will hear “Bluetooth Pairing ON.” Make sure your Bluetooth® enabled device is scanning/searching for devices. Check your device to make sure it has discovered “WorkTunes Connect.” Select “WorkTunes Connect” to connect to the hearing protector. Once connected successfully, you will hear “Bluetooth Connected” and the LED on the right cup will turn blue.
Your Bluetooth® audio volume will be controlled by your device.
The next time you power up, your hearing protector will automatically connect to your device and say “Bluetooth Connected.”
Forward/Back or Pause/Play*
To pause or play audio on your device, you can single-press the button on the right cup. To advance tracks, double-press the button. Triple press to select the previous track.
*Some devices may not be compatible with this feature and will have to be operated using their native controls.
Incoming Calls
In Bluetooth® Mode, incoming phone calls will cause the music to be muted and you will hear your phone’s ringtone until the call has ended. To answer an incoming call, press the button on the hearing protector once. To disconnect from a call, press the button once more. After disconnecting from the call you will hear “Call Terminated.”
To reject a call and return to Bluetooth® audio, press and hold the button. After rejecting a call you will hear “Call Terminated.”
WorkTunes™ Connect Wireless Hearing Protector Bluetooth® Range
The typical range between a Bluetooth® device and the WorkTunes™ Connect Wireless Hearing Protector is approximately 25 feet. This distance may vary depending on the device. As the distance between the Bluetooth® device and the hearing protector is increased, the risk of signal dropouts will also increase. For best results, keep your Bluetooth® device on your body or within arm’s length of the WorkTunes™ Connect Wireless Hearing Protector while using Bluetooth® mode.
Bluetooth® Technical Details Transmission power range: -6 dBm to +4 dBm (ERP) Operating frequency band: 2402 MHz – 2480 MHz
Audio Input Mode
Connect Device:
Connect the device using a compatible 3 or 4-pole 3.5mm stereo audio cable. Turn on the hearing protector.
Control device:
Use the native controls on the device to control input volume, pause/play, and select tracks.
Quickstart Guide
Some devices may not be compatible with this feature and will have to be operated using their native controls.
NOISE REDUCTION RATING (NRR)
The Environmental Protection Agency (EPA) has selected the Noise Reduction Rating (NRR) as the measure of a hearing protector’s noise-reducing capabilities. 3M makes no warranties as to the suitability of the NRR as a measure of actual protection from any noise level since such protection depends on the sound level (loudness), how long you listen to the loud sound and how well you fit the earmuff over your ears. Although hearing protectors can be recommended for protection against the harmful effects of impulse noise, the NRR is based on the attenuation of continuous noise and may not be an accurate indicator of the protection attainable against impulse noise such as gunfire.
When worn according to the User Instructions, this hearing protector helps reduce exposure to both continuous noises, such as industrial noises and noises from vehicles and aircraft, as well as very loud impulse noises, such as gunfire. It is difficult to predict the required and/or actual hearing protection obtained during exposure to impulse noises. For gunfire, the weapon type, the number of rounds fired, proper selection, fit and use of hearing protection, proper care of hearing protection, and other variables will impact performance. If your hearing seems dulled or you hear a ringing or buzzing during or after any noise exposure (including gunfire), or for any other reason you suspect a hearing problem, your hearing may be at risk. To learn more about hearing protection for impulse noise, visit www.3Mcom/hearing.
The NRR may overestimate the hearing protection provided during typical use due to variations in fit, fitting skill and motivation of the user. 3M recommends the NRR be reduced by 50% or in accordance with applicable regulations, for estimating the amount of noise reduction provided.
The NRR for the WorkTunes™ Connect Wireless Hearing Protector is 24 dB(A). Improper fit of this device will reduce its effectiveness in attenuating noise. Consult the enclosed instructions for proper fit.
ATTENUATION DATA (ANSI S3.19-1974)
| Test Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 3150 | 4000 | 6300 | 8000 | NRR | CSA
Class |
| Mean Attenuation (dB) | 18.6 | 21.0 | 28.5 | 32.4 | 35.1 | 39.1 | 41.4 | 41.7 | 41.1 |
24 |
A |
| Standard Deviation | 3.2 | 2.3 | 2.6 | 3.2 | 2.6 | 3.3 | 3.1 | 3.1 | 3.3 |
The level of noise entering a person’s ear when a hearing protector is worn as directed is closely approximated by the difference between the A-weighted environmental noise level and the NRR.
EXAMPLE
- The environmental noise level as measured at the ear is 92 decibels dB(A).
- The NRR is 24 dB(A).
- The level of noise entering the ear is approximately 68 dB(A).
CAUTION
For noise environments dominated by frequencies below 500 Hz, the C-weighted environmental noise level should be used. The NRR used in the above example was achieved under laboratory conditions.
AS/NZS 1270:2002
| Test Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 |
| Mean Attenuation (dB) | 21.6 | 27 | 37.4 | 42 | 38.6 | 41.2 | 41 |
| Standard Deviation | 3.5 | 3 | 3.1 | 3.8 | 2.6 | 2.2 | 3.8 |
AUDIO INPUT LEVEL
The audio level in the hearing protector is dependent on the audio input level. To prevent harmful noise levels, the hearing protector’s audio level is limited to 82 dB(A) when connected to a Personal Music Player (PMP). If the hearing protector is connected to a PMP or other device with a very high output level, it is the user’s responsibility to set the audio input level to a safe level. The maximum permitted audio input level for 8 hours of usage time, compressed speech and music is 2.12 V.
WARRANTY
The WorkTunes™ Connect Wireless Hearing Protector is warranted to be free of defects in material and workmanship for a period of one (1) year from the date of original purchase. 3M will, at its option, repair or replace without charge, except for transportation costs, parts that fail under normal use and service when operated and maintained in accordance with our instructions. This warranty does not cover damage caused by misuse, abuse or unauthorized modifications. Proof of purchase is required to verify eligibility.
