PROHEAR 033A
PROHEAR 033A Bluetooth 5.3 DAB/FM Radio Hearing Protection Earmuffs
User Manual
Introduction
Thank you for choosing the PROHEAR 033A Bluetooth 5.3 DAB/FM Radio Hearing Protection Earmuffs. This device is designed to provide effective hearing protection in noisy environments while allowing you to enjoy digital radio (DAB+), FM radio, and Bluetooth audio streaming. Please read this manual thoroughly before using the earmuffs to ensure proper operation and safety.

Image: Front view of the PROHEAR 033A earmuffs, showing the orange and black design with an LCD screen and control buttons on the left earcup.
Safety Information
Your safety is paramount. These earmuffs are designed to reduce exposure to hazardous noise levels. Always ensure they are worn correctly and maintained properly.
- Noise Reduction Rating (NRR) / Single Number Rating (SNR): These earmuffs provide an SNR of 31 dB. This indicates the level of noise reduction provided by the device.
- Always wear the earmuffs in noisy environments where hearing protection is recommended or required.
- Ensure a proper seal around your ears. Hair, eyeglasses, or other objects can compromise the seal and reduce effectiveness.
- Do not modify the earmuffs. Unauthorized modifications may reduce their effectiveness and void the warranty.
- Keep the earmuffs clean and dry.
- The volume of the integrated audio features should be kept at a level that allows you to hear important warning signals or communications in your environment.

Image: Diagram illustrating various noise levels (dB) and the corresponding safe exposure times, along with common applications like woodworking, mowing, and construction where hearing protection is essential. The earmuffs are shown on a person using an angle grinder.
Package Contents
Please check the package for the following items:
- PROHEAR 033A DAB+ Bluetooth Radio Ear Defenders
- Leather Storage Bag
- Instruction Manual
- 3.5mm Connection Cord (AUX cable)
- USB-C Charging Cable

Image: An exploded view showing the PROHEAR 033A earmuffs, a leather storage bag, the product box, a 3.5mm audio cable, an instruction manual, and a USB-C charging cable, all included in the package.
Product Overview
Familiarize yourself with the components of your PROHEAR 033A earmuffs.
- Adjustable Headband: Ensures a comfortable and secure fit for various head sizes.
- Padded Earcups: Provide comfort and effective noise sealing.
- LCD Backlight Display: Shows current mode, frequency, battery status, and other information.
- Control Buttons: For power, mode selection, volume, and tuning.
- Retractable Antenna: For optimal radio reception.
- USB-C Charging Port: For recharging the internal battery.
- 3.5mm AUX Input: For wired audio connection to external devices.

Image: Close-up views highlighting key design features: the USB-C charging port, the ultra-wide padded headband for comfort, the LCD backlight display, and the adjustable headband mechanism.
Setup
1. Charging the Earmuffs
Before first use, fully charge the earmuffs. The built-in 2000 mAh lithium-ion battery provides up to 30 hours of continuous playback in Bluetooth mode.
- Locate the USB-C charging port on the earcup.
- Connect the provided USB-C cable to the earmuffs and the other end to a USB power adapter (not included) or a computer USB port.
- The LED indicator on the earmuffs will show charging status (refer to the manual's LED indicator section for details, if available on the physical manual).
- Charging typically takes approximately 6 hours for a full charge.

Image: Visual representation of the charging process and battery life, indicating 6 hours for charging, a 2000 mAh rechargeable battery, and over 50 hours of playtime (note: feature bullet says 30 hours for Bluetooth, this image says 50H play, will use 30 hours as it's more specific to Bluetooth).
2. Adjusting the Fit
For optimal hearing protection and comfort, adjust the earmuffs to fit snugly over your ears.
- Extend the headband and place the earmuffs over your ears.
- Adjust the height of the earcups by sliding them up or down the headband until they fully cover your ears and create a tight seal.
- Ensure no hair, clothing, or other objects interfere with the earcup seal.
Operating Instructions
1. Power On/Off
- To Power On: Press and hold the Power button (usually marked with a power icon) for a few seconds until the LCD screen illuminates.
- To Power Off: Press and hold the Power button again for a few seconds until the screen turns off.
2. Mode Selection
Press the "M" (Mode) button to cycle through the available modes: Bluetooth, DAB+, and FM Radio.
3. Bluetooth Operation
The earmuffs feature Bluetooth 5.3 for stable wireless connection.
- Pairing:
- Switch the earmuffs to Bluetooth mode. The LCD screen will display "Bluetooth" or a similar indicator, and the earmuffs will enter pairing mode (often indicated by a flashing Bluetooth icon).
- On your mobile device, enable Bluetooth and search for "PROHEAR 033A" or a similar device name.
- Select the device to pair. Once connected, the earmuffs will confirm with an audible prompt or a steady Bluetooth icon on the screen.
- Music Playback:
- Use the Play/Pause button to control music playback.
- Use the Next/Previous track buttons (often combined with volume controls) to skip tracks.
- Call Management:
- With the built-in microphone, you can answer and make calls without removing the earmuffs.
- Press the Play/Pause button to answer or end a call.
- Press and hold the Play/Pause button to reject an incoming call.
4. DAB+ / FM Radio Operation
Enjoy digital and analog radio broadcasts.
- Antenna: Extend the retractable antenna for optimal reception.
- First-Time Scan (DAB+):
- In DAB+ mode, press and hold the "M" button to initiate a "Full Scan". This will search for and store all available DAB+ stations.
- Automatic Scan (FM):
- In FM mode, press and hold the Scan button (often the Play/Pause button or a dedicated scan button) to automatically scan and save available FM stations (87.5-108 MHz).
- Station Presets:
- The earmuffs can store up to 20 DAB+ stations and 20 FM stations. Refer to the physical manual for specific instructions on saving and recalling presets.
- Manual Tuning:
- Use the tuning buttons (often +/- or arrow buttons) to manually adjust the frequency.
5. Volume Control
Use the volume buttons (usually marked with +/-) to adjust the listening volume. Be mindful of your surroundings and keep the volume at a safe level.

Image: A man wearing the PROHEAR 033A earmuffs while mowing a lawn, demonstrating the product's use in a noisy outdoor environment. Key features like SNR 31dB, DAB+/FM-Radio, and Bluetooth 5.3 are highlighted.
Maintenance
- Cleaning: Wipe the earmuffs with a soft, damp cloth. Do not use abrasive cleaners or immerse the device in water.
- Storage: Store the earmuffs in a cool, dry place, away from direct sunlight and extreme temperatures. Use the provided leather storage bag for protection.
- Battery Care: To prolong battery life, charge the earmuffs regularly, even if not in frequent use. Avoid fully discharging the battery for extended periods.
- Earcup Replacement: Over time, earcup cushions may wear out. Replace them if they become cracked or hardened to maintain optimal noise reduction. (No info on replacement parts, but general maintenance advice).
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Earmuffs do not power on. | Low or depleted battery. | Charge the earmuffs using the USB-C cable. |
| Poor or no radio reception (DAB+/FM). | Weak signal area; antenna not extended; incomplete scan. | Extend the antenna fully. Perform a "Full Scan" for DAB+ or an "Auto Scan" for FM. Move to an area with better signal. |
| Bluetooth not connecting or disconnecting frequently. | Earmuffs not in pairing mode; device too far; interference; previously paired device. | Ensure earmuffs are in Bluetooth pairing mode. Move closer to your device. Disconnect from other Bluetooth devices. Try re-pairing. |
| No sound from earmuffs. | Volume too low; earmuffs muted; incorrect mode selected. | Increase volume. Check if earmuffs are muted. Ensure correct mode (Bluetooth, DAB+, FM) is selected. |
| Uncomfortable fit or reduced noise protection. | Improper adjustment; worn ear cushions; interference with seal. | Adjust headband for a snug fit. Ensure no hair or glasses break the seal. Consider replacing ear cushions if worn. |
Specifications
| Model: | PROHEAR 033A |
| Noise Reduction Rating (SNR): | 31 dB |
| Bluetooth Version: | 5.3 |
| Battery Type: | Built-in 2000 mAh Lithium-ion |
| Charging Port: | USB-C |
| Playback Time (Bluetooth): | Up to 30 hours |
| FM Frequency Range: | 87.5-108 MHz (Step Frequency: 50 kHz) |
| DAB+ Support: | Yes |
| Preset Stations: | Up to 20 DAB+ and 20 FM stations |
| Dimensions (Package): | 20.5 x 16 x 10.5 cm |
| Weight (Package): | 400 grams |
| Fabric Type: | Durable ABS shell, ultra-soft cushion, portable design |
Warranty and Support
PROHEAR is committed to your satisfaction. We offer comprehensive after-sales service for our products.
- Return and Exchange Policy: Enjoy a hassle-free 30-day return and exchange policy.
- Quality Warranty: The product comes with a 1-year quality warranty.
- Customer Service: Our 24-hour online customer service team is available to address any questions or concerns you may have. Please refer to the product packaging or PROHEAR's official website for contact information.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.


