1. Introduction
This manual provides detailed instructions for the safe and effective use of your ZOHAN EM033 Bluetooth AM/FM Radio Hearing Protection Headphones. Please read this manual thoroughly before operating the device and retain it for future reference.
The ZOHAN EM033 headphones are designed to provide hearing protection with a Noise Reduction Rating (NRR) of 25dB, while also offering audio entertainment through Bluetooth 5.4 connectivity, AM/FM radio, and an AUX input. They feature a 2000mAh rechargeable battery for extended use.
Image 1.1: ZOHAN EM033 Headphones and accessories.
2. Safety Information
Important Safety Instructions:
- Always wear hearing protection in noisy environments to prevent hearing damage.
- Ensure the earmuffs fit snugly over your ears to achieve the stated Noise Reduction Rating (NRR 25dB / SNR 30dB).
- Do not modify the device. Unauthorized modifications may compromise safety and void the warranty.
- Keep the device away from water and excessive moisture.
- Avoid exposing the battery to extreme temperatures or direct sunlight.
- Use only the provided charging cable or a compatible 3.5mm to USB cable for charging.
Image 2.1: The headphones provide 25dB NRR for effective noise reduction in loud environments.
3. Product Overview
Familiarize yourself with the components and controls of your ZOHAN EM033 headphones.
Image 3.1: Overview of headphone controls and features.
- Digital LCD Display: Shows current mode, frequency, and battery status.
- Power On/Off Button: Press and hold to power on or off.
- Mode Button (M): Switches between Bluetooth, FM, AM, and AUX modes. Also used for call management.
- Tuning/Track Buttons (< / >): Used for tuning radio stations or skipping tracks in Bluetooth mode.
- Volume Control Knob: Rotates to adjust volume.
- Charging Port: For connecting the USB charging cable.
- Audio Jack (3.5mm): For connecting external audio devices via AUX cable.
- Antenna: For improved radio reception.
4. Setup
4.1. Charging the Battery
The ZOHAN EM033 headphones are equipped with a built-in 2000mAh rechargeable lithium battery. Before first use, fully charge the headphones.
- Locate the charging port on the side of the earmuff.
- Connect the provided 3.5mm to USB charging cable to the charging port.
- Plug the USB end of the cable into a compatible USB power source (e.g., USB charger, power bank, laptop/PC, car charger).
- The LCD display will indicate charging status. A full charge typically takes approximately 4-5 hours.
A fully charged battery provides up to 48 hours of playtime in Bluetooth mode and over 40 hours in AM/FM/AUX mode.
Image 4.1: Detachable battery design for easy replacement.
Image 4.2: The standard 3.5mm to USB charging cable.
4.2. Wearing the Headphones
For optimal hearing protection and comfort, adjust the headphones properly.
- Extend the headband and place the earmuffs over your ears.
- Adjust the headband until it rests comfortably on your head and the ear cushions fully seal around your ears.
- Ensure no hair or clothing interferes with the seal of the ear cushions.
Image 4.3: The ear cushions are designed for comfort and effective noise isolation.
5. Operating Instructions
5.1. Power On/Off
- To Power On: Press and hold the Power button (ⓘ) for approximately 3 seconds until the LCD display lights up.
- To Power Off: Press and hold the Power button (ⓘ) for approximately 3 seconds until the LCD display turns off.
5.2. Mode Selection
Press the Mode button (M) to cycle through the available modes: Bluetooth (BT), FM Radio, AM Radio, and AUX Input.
5.3. Bluetooth Mode
The headphones feature advanced Bluetooth 5.4 technology for stable and fast connections.
- Pairing: When powered on, the headphones will automatically enter Bluetooth pairing mode if no device is connected. The Bluetooth icon on the LCD will flash. On your device (smartphone, tablet, etc.), enable Bluetooth and select "ZOHAN EM033" from the list of available devices. Once connected, the Bluetooth icon will stop flashing.
- Music Control:
- Play/Pause: Single press the Mode button (M).
- Next Track: Single press the > button.
- Previous Track: Single press the < button.
- Call Management:
- Answer/End Call: Single press the Mode button (M).
- Reject Call: Long press the Mode button (M) for 3 seconds.
- Redial Last Number: Long press the Mode button (M) for 3 seconds when not on a call.
Image 5.1: Bluetooth mode controls for music and calls.
5.4. AM/FM Radio Mode
The headphones offer broad radio reception capability with storage for up to 10 AM and 10 FM stations.
- Select Radio Mode: Press the Mode button (M) until FM or AM is displayed on the LCD.
- Automatic Scanning: Long press the < or > button to automatically scan for and save available stations.
- Manual Tuning: Short press the < or > button to manually tune to the next frequency.
- Recalling Saved Stations: Short press the Mode button (M) to cycle through saved stations.
5.5. AUX Input Mode
Connect external audio devices using the 3.5mm audio cable.
- Connect one end of the 3.5mm audio cable to the Audio Jack on the headphones.
- Connect the other end to the audio output of your external device.
- The headphones will automatically switch to AUX mode, or you can select it using the Mode button (M).
- Audio playback and volume will be controlled by your external device and the headphone's volume knob.
5.6. Volume Adjustment
Rotate the volume control knob located at the bottom of the right earmuff to increase or decrease the audio volume.
6. Maintenance
Proper maintenance ensures the longevity and performance of your headphones.
- Cleaning: Wipe the headphones with a soft, damp cloth. Do not use abrasive cleaners or immerse the device in water.
- Ear Cushion Replacement: The ear cushions are designed for easy replacement. Gently snap them off and replace with new ones as needed to maintain hygiene and acoustic seal.
- Storage: Store the headphones in a cool, dry place, away from direct sunlight and extreme temperatures. Use the provided carrying bag for protection during transport.
- Battery Care: If storing for extended periods, charge the battery every 3-6 months to prolong its lifespan.
7. Troubleshooting
If you encounter issues, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones do not power on. | Low battery. | Charge the battery fully. |
| No sound. | Volume too low; incorrect mode; device not connected. | Increase volume; switch to correct mode (BT/FM/AM/AUX); ensure Bluetooth device is paired or AUX cable is connected. |
| Bluetooth not connecting. | Headphones not in pairing mode; device Bluetooth off; too far from device. | Ensure headphones are in pairing mode; enable Bluetooth on your device; move closer to your device (within 50ft/15m). |
| Poor radio reception. | Weak signal; antenna position. | Adjust the antenna position; try moving to an area with better signal. |
| Charging issue / Burning smell. | Faulty cable; internal component damage. | Immediately disconnect from power. Do not attempt to use. Contact customer support. |
8. Specifications
- Model: EM033
- Noise Reduction Rating (NRR): 25dB
- Signal-to-Noise Ratio (SNR): 30dB
- Bluetooth Version: 5.4
- Bluetooth Range: Up to 50 feet (15 meters)
- Battery Capacity: 2000mAh Rechargeable Lithium Battery
- Playtime: Up to 48 hours (Bluetooth mode), 40+ hours (AM/FM/AUX mode)
- Charging Time: Approximately 4-5 hours
- Product Dimensions: 6.3 x 4.1 x 8.1 inches
- Item Weight: 1.15 pounds
- Certifications: ANSI S3.19-1974, CE EN 352-1, IC, CE, FC
9. Warranty and Support
Your ZOHAN EM033 headphones come with a One Year Warranty, ensuring quality assurance. For any product inquiries, technical support, or warranty claims, please refer to the contact information provided in your product packaging or visit the official ZOHAN website.