Introduction
Thank you for choosing the JINGHAO JH-338 Rechargeable Personal Sound Amplifier. This manual provides essential information for the safe and effective use of your device. Please read it thoroughly before operation and keep it for future reference.
Important Safety Information
- Consult a medical professional if you experience sudden or severe hearing loss, ear pain, or discharge before using this device.
- This device is a personal sound amplifier and is not intended to diagnose, treat, cure, or prevent any disease.
- Keep out of reach of children and pets. Small parts may pose a choking hazard.
- Avoid exposing the device to extreme temperatures, humidity, or direct sunlight.
- Do not attempt to modify or repair the device yourself. Contact customer support for assistance.
- Remove the device before showering, swimming, or using hairspray.
- If you experience discomfort or irritation, discontinue use and consult a medical professional.
Package Contents
Ensure all items are present in the package:
- JINGHAO JH-338 Personal Sound Amplifier (Pair)
- Charging Dock
- User Manual
- Storage Box
- Ear Domes (8 pieces in various sizes: XS, S, M, L)
- Cleaning Tools
- Charging Cable
Image: The JINGHAO JH-338 Personal Sound Amplifier, charging dock, and various accessories included in the package.
Product Overview
Familiarize yourself with the components of your JINGHAO JH-338 amplifier.
Image: A detailed view of the JINGHAO JH-338 amplifier, highlighting the clear ON/OFF switch and the volume control wheel. The switch has visible 'ON' and 'OFF' positions.
- Main Unit: Houses the electronics, battery, and controls.
- Ear Hook: Sits behind the ear, holding the device in place.
- Sound Tube: Connects the main unit to the ear dome.
- Ear Dome: Soft tip inserted into the ear canal for sound delivery.
- ON/OFF Switch: Clearly visible switch to power the device on or off.
- Volume Control Wheel: Allows for precise adjustment of sound amplification.
Setup and First Use
- Unpack the Device: Carefully remove the hearing amplifier and all accessories from the packaging.
- Initial Charging: Before first use, fully charge the hearing amplifier. Refer to the "Charging the Device" section for detailed instructions.
- Select Ear Domes: Choose the ear dome size (XS, S, M, L) that provides a comfortable and secure fit in your ear canal. A proper fit is crucial for optimal sound quality and to prevent feedback.
- Attach Ear Dome: Securely attach the selected ear dome to the end of the sound tube.
- Position the Amplifier: Place the ear hook over the top of your ear, behind the earlobe. Gently insert the ear dome into your ear canal. Adjust the sound tube for a comfortable fit.
Operation
Power On/Off
The device features a clear ON/OFF switch for easy control.
- To Turn On: Slide the power switch to the 'ON' position. A green indicator may become visible, confirming the device is active.
- To Turn Off: Slide the power switch to the 'OFF' position. The green indicator will disappear. Turn off the device when not in use to conserve battery life.
Image: A close-up diagram illustrating the power switch. The top image shows the switch in the 'OFF' position, and the bottom image shows it in the 'ON' position with a green indicator.
Volume Adjustment
Adjust the volume to your preferred level using the control wheel.
- Increase Volume: Gently roll the volume control wheel upwards to increase the sound amplification.
- Decrease Volume: Gently roll the volume control wheel downwards to decrease the sound amplification.
Image: A diagram demonstrating the volume adjustment. It shows the volume wheel with an upward arrow indicating volume increase and a downward arrow indicating volume decrease, accompanied by speaker icons.
The device allows for continuous and gradual volume adjustments, enabling personalized sound settings for each ear.
Charging the Device
The JINGHAO JH-338 uses Nickel-Metal Hydride (NiMH) rechargeable batteries for safe and environmentally friendly power.
- Connect the Charging Dock: Plug the charging cable into the charging dock and connect the other end to a suitable USB power source (e.g., computer, USB wall adapter).
- Place Amplifiers in Dock: Carefully place the hearing amplifiers into their respective slots in the charging dock. Ensure they are correctly seated.
- Charging Indicator: The charging dock will typically have an indicator light to show charging status. Refer to the dock's specific indicators for full charge confirmation.
- Charging Time: A full charge takes approximately 8.5 hours and provides up to 18 hours of continuous use. It is recommended to charge the device overnight to ensure it is ready for daily use.
- Remove After Charging: Once fully charged, remove the amplifiers from the charging dock.
Image: Two JINGHAO JH-338 amplifiers placed in their charging dock, connected via a USB cable. The image indicates 8.5 hours of charge time for 18 hours of working time.
Maintenance and Care
- Daily Cleaning: Use the provided cleaning tools to gently remove earwax or debris from the ear domes and sound tubes. Wipe the main unit with a soft, dry cloth.
- Avoid Moisture: Do not immerse the device in water or expose it to excessive moisture. If it gets wet, dry it immediately with a soft cloth.
- Storage: When not in use, store the amplifier in its provided storage box in a cool, dry place, away from direct sunlight and extreme temperatures.
- Ear Dome Replacement: Replace ear domes regularly (e.g., every 1-3 months, or as needed) to maintain hygiene and optimal sound quality.
- Battery Care: To prolong battery life, avoid completely draining the battery frequently. Charge regularly as recommended.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or weak sound |
|
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| Whistling or feedback sound |
|
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| Device not charging |
|
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If the problem persists after trying these solutions, please contact JingHao customer support.
Specifications
- Model: JH-338
- Brand: JingHao
- Type: Behind-the-Ear (BTE) Personal Sound Amplifier
- Power Source: Rechargeable Battery
- Battery Type: Nickel-Metal Hydride (NiMH)
- Charging Time: Approximately 8.5 hours
- Operating Time: Up to 18 hours per full charge
- Weight: 180 grams (total package weight, device weight not specified)
- Material: High-quality hypoallergenic materials
- Special Features: Volume control, Rechargeable, Adjustable, Clear ON/OFF window
- Color: Beige
Warranty and Support
JingHao is committed to providing quality products and customer satisfaction. For any questions, concerns, or technical support regarding your JH-338 Personal Sound Amplifier, please contact our customer service team.
Please refer to your purchase documentation for specific warranty terms and conditions. Keep your proof of purchase for warranty claims.
Contact Information:
- Online Support: Visit the JingHao Store on Amazon.
- Seller Contact: You can also contact the seller "JINGHAO Healthcare" directly through your Amazon order history for assistance.
