1. Introduction
This manual provides essential instructions for the safe and effective use of your Mirasing J20 Hearing Amplifier. Please read this manual thoroughly before using the device and retain it for future reference. The Mirasing J20 is designed to enhance sound for individuals experiencing hearing difficulties, featuring noise-cancelling capabilities and a discreet, in-ear design.
2. Product Overview
The Mirasing J20 Hearing Amplifier is a compact and lightweight device designed for comfortable, nearly invisible wear. It features advanced circuitry for clear sound and noise reduction, making it suitable for various listening environments.
Key Features:
- Invisible Design: Small and discreet, designed to fit comfortably within the ear canal.
- Clear Sound Quality: Optimal circuitry design with 30 dB peak gain for natural sound.
- Noise Reduction: Helps to minimize background noise for enhanced speech clarity.
- Soft and Flexible Ear Domes: Made from high-quality medical material for a comfortable and secure fit.
- Easy Operation: Simple volume control and on/off switch for user convenience.
Components:
Familiarize yourself with the main components of your Mirasing J20 Hearing Amplifier:

Image: Labeled components of the Mirasing J20 Hearing Amplifier, including the battery compartment, on/off switch, removal cord, microphone, volume control, and earplug.
- Battery Compartment & On/Off Switch: Located on the device, used for inserting the A10 battery and turning the device on or off.
- Removal Cord: A small cord attached to the device for easy removal from the ear.
- Microphone: Captures sound from the environment.
- Volume Control: A small knob or button to adjust the sound amplification level.
- Earplug (Ear Dome): The soft, flexible part that fits into the ear canal.
3. Setup
Before first use, ensure all components are present and follow these steps for initial setup.
Package Contents:
Verify that your package contains the following items:

Image: Contents of the Mirasing J20 Hearing Amplifier package, including the device, instruction manual, carrying case, various earplugs, wax guard tool, batteries, and cleaning brush.
- 1 Hearing Amplifier (Mirasing J20)
- Instruction Manual
- Shockproof Case
- 9 Earplugs (various sizes: L, M, S)
- Wax Guard and Tool
- 2 A10 Batteries
- 1 Cleaning Brush
Initial Setup Steps:
- Unpack: Carefully remove the hearing amplifier and all accessories from its packaging.
- Insert Battery: Open the battery compartment and insert one A10 battery, ensuring correct polarity. Close the compartment securely.
- Select Earplug: Choose an earplug (ear dome) size that provides a comfortable and snug fit in your ear canal. A proper fit is crucial for optimal sound quality and to prevent feedback.
- Place in Ear: Gently insert the hearing amplifier into your ear canal. Use the removal cord to assist with positioning.
- Turn On: Locate the on/off switch (often integrated with the battery compartment) and turn the device on.
- Adjust Volume: Slowly adjust the volume control to a comfortable listening level. Avoid sudden increases in sound.
4. Operating Instructions
The Mirasing J20 is designed for straightforward operation.
Turning On/Off:
The on/off switch is typically part of the battery compartment. Closing the battery compartment turns the device on, and opening it turns the device off. Always turn off the device when not in use to conserve battery life.
Volume Adjustment:
Use the small volume control knob on the device to adjust the sound level. Rotate it gently to increase or decrease amplification. Start with a lower volume and gradually increase it until you reach a comfortable listening level. Avoid setting the volume too high, as this can cause discomfort or feedback.
Wearing the Device:
Ensure the earplug is securely and comfortably seated in your ear canal. The discreet design allows for nearly invisible wear, suitable for various occasions, from watching television to outdoor activities.
5. Maintenance
Proper maintenance ensures the longevity and optimal performance of your Mirasing J20 Hearing Amplifier.
Daily Cleaning:
- After each use, gently wipe the device with a soft, dry cloth.
- Use the provided cleaning brush to remove any earwax or debris from the earplug and microphone port.
- Never use water, cleaning solutions, or alcohol directly on the device, as this can cause damage.
Earplug Care:
- Regularly inspect the earplug for wax buildup. If necessary, remove the earplug and clean it separately with a mild soap and water solution, then rinse thoroughly and allow it to dry completely before reattaching.
- Replace earplugs periodically, especially if they become stiff, discolored, or damaged, to maintain comfort and sound quality.
Battery Replacement:
The Mirasing J20 uses A10 batteries. When the sound becomes weak or the device stops functioning, it's time to replace the battery. Open the battery compartment, remove the old battery, and insert a new A10 battery with the correct polarity. Dispose of used batteries responsibly.
Storage:
When not in use, store the hearing amplifier in its shockproof case in a cool, dry place, away from direct sunlight and extreme temperatures. Remove the battery if storing for an extended period.
6. Troubleshooting
If you encounter issues with your Mirasing J20 Hearing Amplifier, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or weak sound |
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| Whistling or feedback sound |
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| Sound is unclear or distorted |
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7. Specifications
Technical details for the Mirasing J20 Hearing Amplifier:

Image: Technical data table for the Mirasing J20 Hearing Amplifier, detailing acoustic performance and battery life.
- Model Number: J20
- Brand: Mirasing
- Product Dimensions: 0.79 x 0.47 x 0.04 inches
- Weight: Approximately 0.05 ounces (1.3 grams)
- Power Source: Battery Powered (1 x A10 Lithium Ion battery required)
- Special Feature: Noise Reduction
- Peak Gain: 30 dB (as per product features)
- Battery Life (Type 10A, 95mAh): Approximately 86 hours (refer to technical data image)
- Frequency Range: 200-7770 Hz (refer to technical data image)
8. Warranty and Support
Specific warranty details for the Mirasing J20 Hearing Amplifier are not provided within this manual. Please refer to the product packaging, the seller's website, or contact Mirasing customer support directly for information regarding warranty coverage and support services.
For further assistance or inquiries, please contact the manufacturer or your point of purchase.



