3M WorkTunes Connect Wireless Hearing Protector
Featuring Bluetooth® wireless technology
Basic Operations
Charging the Headset
To comply with regulatory guidelines, your hearing protector has been shipped with a partial charge on its integrated lithium ion battery pack. To charge, insert the supplied micro-USB connector cable into the micro-USB jack located on the bottom of the right cup. Connect the other end of the cable to a suitable USB power source, such as a computer or a third-party certified (UL, Intertek, etc.) AC to USB wall adapter.
The LED indicator will blink blue while charging and change to solid blue when complete.
Fitting the Headset
Fully extend the sliders and place the cups over your ears. Then, tighten the headband using the sliders to ensure a secure fit.
Power and Volume
Press and hold the power button for 3 seconds to power the headset ON or OFF. Voice Assist will announce "Power ON" or "Power OFF." Voice assist also provides battery status updates: "Battery High," "Battery Medium," "Battery Low," or "Battery Empty." Adjust the volume using your connected device.
Low Battery Warning
The hearing protector will 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. To turn it back on after auto shut-off, press and hold the ON/OFF button for 3 seconds.
Bluetooth® Operation
Pairing the Device
Once powered on, double-press the button on the right cup to enter pairing mode. You will hear "Bluetooth Pairing ON." Ensure your Bluetooth® enabled device is scanning for devices. Select "WorkTunes Connect" on your device to connect. Upon successful connection, 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 announce "Bluetooth Connected."
Forward/Back or Pause/Play
To pause or play audio on your device, single-press the button on the right cup. To advance tracks, double-press the button. Triple-press to select the previous track. (Note: Some devices may not be compatible with these functions and require native controls.)
Incoming Calls
In Bluetooth® Mode, incoming phone calls will mute the music, and you will hear your phone's ringtone. To answer a call, press the button once. To disconnect from a call, press the button once more; you will hear "Call Terminated." To reject a call and return to Bluetooth® audio, press and hold the button; you will hear "Call Terminated."
Bluetooth® Range
The typical range between a Bluetooth® device and the WorkTunes™ Connect Wireless Hearing Protector is approximately 25 feet (7 meters). This distance may vary. For best results, keep your Bluetooth® device on your body or within arm's length.
Bluetooth® Technical Details
- Transmission power range: -6 dBm to +4 dBm (ERP)
- Operating frequency band: 2402 MHz – 2480 MHz
Audio Input Mode
Connect your device using a compatible 3 or 4-pole 3.5mm stereo audio cable. Turn on the hearing protector. Use the native controls on your device to manage input volume, pause/play, and select tracks.
Quickstart Guide Summary
| Mode | Action | Result |
|---|---|---|
| Bluetooth® | Pair: Double press button | Connect to device |
| Bluetooth® | Pause/Play: Single press button | Control audio playback |
| Bluetooth® | Advance Tracks: Double press button | Next track |
| Bluetooth® | Previous Tracks: Triple press button | Previous track |
| Phone Call | Answer Call: Single press button | Take/End call |
| Phone Call | Reject Call: Press and hold button | Decline incoming call |
| Audio Input | All Functions | Use device controls |
Safety Information
Please read, understand, and follow all safety information before using this electronic hearing protection product. Retain these instructions for future reference.
Intended Use
This product is intended to help protect against harmful noise in loud-noise environments. Use in any other application has not been evaluated by 3M and may lead to an unsafe condition.
Explanation of Signal Word Consequences
- WARNING: Indicates a hazardous situation which, if not avoided, could result in serious injury or death.
- CAUTION: Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury and/or property damage.
General Safety Warnings
These hearing protectors help reduce exposure to hazardous noise. Misuse or failure to wear them at all times of noise exposure may result in hearing loss or injury. For proper use, consult user instructions or call 3M Technical Service at 1-800-494-3552.
Electrical and Fire Safety
- Never use or charge/replace batteries in an explosive environment.
- Only charge using third-party certified (UL, Intertek, etc.) equipment.
- Do not disassemble, modify, or service this device; it contains no user-serviceable parts.
Harmful Noise Safety
- Always wear hearing protectors when exposed to noise.
- Ensure hearing protection is properly fitted. Follow fitting instructions.
- Do not bend or reshape the headband, as this can cause a loose fit and sound leakage.
- For best protection, ear cushions should seal firmly against the head. Avoid interference from long hair, thick eyeglass temples, pencils, or caps.
- Regularly inspect earmuffs for cracks or worn parts and ensure proper fitting. Replace as needed.
- Do not immerse in water. Clean with a damp cloth and mild soap. Avoid harsh or abrasive chemicals.
- Do not store in direct sunlight or at temperatures above 131°F (55°C).
- (Devices with Safe Volume Technology) Do not switch between 'Safe Volume Control' and 'Limiter' settings during a single workday.
Disposal
The WEEE logo indicates this product must not be disposed of with household waste. Dispose of electronic and electrical waste at specified collection points for recycling. Follow all applicable local and governmental regulations.
Regulatory Information
FCC WARNING
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with part 15 of the FCC Rules. Operation is subject to 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. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules, designed to provide reasonable protection against harmful interference in a residential installation. If interference occurs, try to correct it by reorienting or relocating the receiving antenna, increasing separation between equipment and receiver, or connecting to a different circuit. This equipment complies with FCC RF radiation exposure limits for an uncontrolled environment.
ISEDC WARNING
This device complies with Innovation, Science, and Economic Development Canada license-exempt RSS standard(s). Operation is subject to two conditions: 1. this device may not cause interference, and 2. this device must accept any interference, including interference that may cause undesired operation. This Class B digital apparatus complies with Canadian ICES-003. Users can obtain Canadian information on RF exposure and compliance.
Noise Reduction Rating (NRR)
The Environmental Protection Agency (EPA) selected the Noise Reduction Rating (NRR) as the measure of a hearing protector's noise-reducing capabilities. The NRR for the WorkTunes™ Connect Wireless Hearing Protector is 24 dB(A). The NRR may overestimate protection during typical use due to variations in fit, fitting skill, and user motivation. 3M recommends reducing the NRR by 50% or per applicable regulations for estimating noise reduction.
Improper fit reduces effectiveness. Consult 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 |
Example: If environmental noise is 92 dB(A) and NRR is 24 dB(A), noise entering the ear is approximately 68 dB(A).
Caution: For noise environments dominated by frequencies below 500 Hz, use the C-weighted environmental noise level. NRR was achieved under laboratory conditions.
AS/NZS 1270:2002 Data
| 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 |
SLC80 36 dB Class 5. Clamping Force: 9.8 N. Mass: 353 g.
Audio Input Level
The audio level in the hearing protector depends on the audio input level. To prevent harmful noise levels, the protector's audio level is limited to 82 dB(A) when connected to a Personal Music Player (PMP). If connected to a device with a very high output level, the user is responsible for setting 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 one (1) year from the date of original purchase. 3M will, at its option, repair or replace, without charge (excluding transportation costs), parts that fail under normal use and service when operated and maintained according to instructions. This warranty does not cover damage caused by misuse, abuse, or unauthorized modifications. Proof of purchase is required for eligibility.
Contact Information & Manufacturer
Distributed by:
- USA: 3M, 3M Center, St. Paul, MN 55144-1000. Phone: 1-800-494-3552. Website: www.3MSafety.com
- Canada: 3M Canada, London (Ontario) N6A 4T1. Phone: 1-800-364-3577.
- Mexico: 3M MÉXICO, S.A. DE C.V. AV. SANTA FÉ 190, Col. Santa Fé, México, D.F. R.F.C. TMM-720509 PYA.
- Australia: Phone: 1 800 024 464.
Made in China.
3M and WorkTunes are trademarks of 3M. Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and used under license by 3M.
© 2017, 3M. All rights reserved.
Model: WorkTunes™ 90543
Issue Date: 2017
