Introduction
The NVBOTY K08 Rechargeable Hearing Aids are designed to enhance your listening experience with advanced features. These aids incorporate intelligent noise reduction, a comfortable design, and convenient recharging capabilities to provide clear sound for daily activities.
What's in the Box
Upon opening your NVBOTY K08 package, you should find the following items:
- Hearing Aids × 2 (Left and Right)
- Charging Case × 1
- Type-C Charging Cable × 1
- Ear Domes × 4 Pairs (Sizes S, M, L)
- Cleaning Brush × 1
- User Manual × 1
- Operation Guide × 1

Figure 1: All items included in the NVBOTY K08 hearing aid package.
Setup and Getting Started
1. Initial Charging
Before first use, fully charge the hearing aids and their charging case. The charging case features an LED display to indicate the battery level of both the case and individual hearing aids.

Figure 2: The charging case's LED display shows the charge status of the case and each hearing aid.
2. Selecting Ear Domes
Choose the ear dome size (S, M, or L) that provides the most comfortable and secure fit in your ear canal. A proper fit is crucial for optimal sound quality and to prevent feedback.

Figure 3: Select the appropriate ear dome for a comfortable and effective fit.
3. Powering On/Off
To power on the hearing aids, long press the volume "+" button for 3 seconds. You will hear 4 beeps indicating it is powered on. To power off, long press the volume "+" button again for 3 seconds.
4. Inserting the Hearing Aid
Gently insert the ear dome into your ear canal. Position the main body of the hearing aid behind your ear, ensuring the thin tube is comfortably routed. Adjust until it feels secure and comfortable.

Figure 4: Proper placement of the hearing aid for optimal comfort and sound.
Operating Instructions
Volume Control
The NVBOTY K08 features 5 levels of volume control. Click the volume "+" or "-" buttons on the hearing aid to adjust the sound level. The device includes a volume memory function, retaining your last setting for convenience.

Figure 5: Adjust volume using the dedicated buttons on the hearing aid.
Automatic Noise Cancelling
Equipped with advanced built-in chips and upgraded RIC tubes, these hearing aids significantly reduce background noise. This technology helps to clarify human speech, providing a more comfortable listening experience in various environments.

Figure 6: Advanced DSP technology provides clear sound by reducing unwanted noise.
Charging
The rechargeable hearing aids offer extended battery life. A single charge provides up to 25 hours of use. The portable charging case holds enough power for up to 4 full charges, extending total usage time to approximately 100 hours. The case can be fully charged in about 2 hours using the provided Type-C cable.

Figure 7: Battery life and charging specifications for the NVBOTY K08.
Video 1: This video demonstrates the charging process and highlights the automatic noise cancelling feature of the NVBOTY K08 hearing aids.
Wearing Instructions
The NVBOTY K08 hearing aids are designed to be ultra-lightweight (only 3.2g) and comfortable for extended wear. The ergonomic behind-the-ear design with soft, skin-friendly silicone ear caps ensures a barely-there feel, allowing you to enjoy listening, conversing, and other daily activities without discomfort.

Figure 8: The lightweight and ergonomic design ensures comfort for all-day wear.
Maintenance
Regular cleaning of your hearing aids is essential for optimal performance and hygiene. Use the provided cleaning brush to gently remove any debris from the ear domes and the main body of the hearing aid. Ensure the charging contacts are clean and dry before placing the aids back into the charging case.

Figure 9: Use the included cleaning brush for regular maintenance.
Troubleshooting
If you experience issues with your NVBOTY K08 hearing aids, consider the following:
- No Sound or Low Volume: Ensure the hearing aids are fully charged and powered on. Check the volume level and adjust if necessary. Verify that the ear domes are clean and properly seated in your ear canal.
- Feedback/Whistling: This can often be resolved by ensuring the ear dome is correctly inserted and forms a tight seal in your ear canal. Try a different size ear dome if the current one feels loose.
- Intermittent Sound: Check for any debris blocking the sound outlet or microphone. Ensure the hearing aids are securely placed in the charging case for proper contact.
- Charging Issues: Confirm the Type-C charging cable is securely connected to both the case and a power source. Check the LED display for charging indicators.
For further assistance, please refer to the "Sincere After-sales Service" section.
Specifications
| Model Name | K08 |
| Brand | NVBOTY |
| Color | Black |
| Material | Acrylonitrile Butadiene Styrene (ABS), Resin, Silicone |
| Style | Rechargeable hearing aids for seniors |
| Item Weight | 7.4 ounces (total package) |
| Package Dimensions | 4.45 x 4.41 x 2.44 inches |
| Manufacturer | NVBOTY |
Warranty and Support
NVBOTY is committed to providing excellent customer service. If you require assistance, have questions, or encounter any issues with your hearing aids, please do not hesitate to contact us. Our team is always available to provide support and ensure your satisfaction.