Introduction
This manual provides detailed instructions for the proper use, setup, and maintenance of your Thunelec U9 Wireless Earbuds. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
What's in the Box
- U9 wireless earbuds (2)
- Multifunctional touch charging case (1)
- Charging cable (1)
- User Manual (1)
- Ear tips (3 pairs: S/M/L)

Image: Package contents of the Thunelec U9 Wireless Earbuds.
Product Overview

Image: Thunelec U9 Wireless Earbuds and their charging case.

Image: The earbuds resting in their open charging case, showcasing the integrated touch screen.

Image: A close-up view of one Thunelec U9 Wireless Earbud.
Setup
1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Connect the provided USB-C charging cable to the charging port on the case and a power source. The case's touch screen will display battery levels for both earbuds and the case in real-time. A full charge for the case takes approximately 1.5 hours.

Image: The charging case connected via USB-C, showing charging indicators and battery life information.
2. Pairing with Your Device
- Open the charging case. The earbuds will automatically enter pairing mode.
- On your smartphone, tablet, or laptop, enable Bluetooth.
- Search for available devices and select "U9" from the list.
- Once connected, the earbuds will indicate successful pairing.

Image: One-step auto pairing process with a smartphone.
Operating Instructions
Earbud Touch Controls
The earbuds feature touch-sensitive areas for various functions:
- Play/Pause: Double-tap either earbud.
- Next Song: Long press right earbud for 2 seconds.
- Previous Song: Long press left earbud for 2 seconds.
- Answer/End Call: Single-tap either earbud.
- Reject Call: Long press either earbud for 2 seconds.
- Activate Voice Assistant (Siri): Triple-tap left earbud.
- ANC Mode Switching: Triple-tap right earbud to cycle through Normal, Transparency, and Noise Cancellation modes.
Charging Case Touch Screen Controls
The multifunctional touch screen on the charging case provides extensive control over your earbuds and additional features. Swipe left or right to navigate through the different screens.

Image: The LED full-color touch screen on the charging case, showing multiple functions.
- Music Playback: Control play, pause, and skip tracks directly from the screen.
- Volume Control: Adjust the volume level.
- ANC/Transparency/Normal Modes: Easily switch between Active Noise Cancellation, Transparency, and Normal listening modes.
- 5 EQ Modes: Select from Standard, Classic, Jazz, Rock, and Pop equalization modes to customize your audio experience.
- Timer: Set a timer for various activities.
- Screen Brightness: Adjust the display brightness.
- Language Switch: Choose from seven available languages.
- Screen Lock: Customize the screen lock wallpaper.
- Find My Earphone: Activate a sound on a lost earbud to help locate it.
- Camera Control: Use the case as a remote shutter for your phone's camera.
- Waterproof Mode: Activate a screen protection mode for the display.
Key Features
- ANC & ENC Noise Cancelling: Advanced Active Noise Cancellation (ANC) reduces environmental noise by up to 45dB. Environmental Noise Cancellation (ENC) ensures clear call quality.
- Bluetooth 5.4 & Transparency Mode: Features the latest Bluetooth 5.4 for improved speed, efficiency, and stability. Transparency mode allows you to hear your surroundings for safety.
- Superior Hi-Fi Stereo Sound: Equipped with 14.2mm bio-carbon fiber dynamic coils for powerful bass and clear mid-high frequencies.
- Long-Lasting Playtime: Up to 6-8 hours on a single charge, extended to 48 hours with the charging case.
- IPX7 Waterproof: Sealed design with nano-waterproof coating protects against rain and sweat, making them suitable for sports and outdoor activities.
- Ergonomic Design: Ensures stability and comfort for long-term wear. Includes three sizes of ear tips for a secure fit.
- Wide Compatibility: Seamlessly pairs with almost any Bluetooth-enabled device, including iOS and Android smartphones, tablets, and laptops.

Image: Illustration of ANC and ENC noise cancellation in action.

Image: Exploded view of an earbud, detailing its internal sound components.

Image: Earbuds in use during exercise, emphasizing IPX7 waterproof and comfortable fit.
Maintenance
- Cleaning: Regularly clean the earbuds and charging case with a soft, dry cloth. Do not use abrasive materials or harsh chemicals.
- Ear Tips: Remove and clean ear tips with mild soap and water, then dry thoroughly before reattaching.
- Storage: Store the earbuds in their charging case when not in use to protect them and keep them charged.
- Avoid Extreme Conditions: Do not expose the earbuds or case to extreme temperatures, humidity, or direct sunlight for extended periods.
Troubleshooting
- Earbuds not pairing: Ensure both earbuds are in the charging case, then open the lid to activate pairing mode. Check your device's Bluetooth settings to ensure it's discoverable and select "U9".
- No sound from one earbud: Place both earbuds back in the case, close the lid, and then reopen it. Re-pair with your device if necessary.
- Charging issues: Ensure the charging cable is securely connected to both the case and the power source. Check for any debris in the charging port.
- Touch controls unresponsive: Ensure your fingers are clean and dry. If the issue persists, place the earbuds back in the case and restart the connection.
- Screen unresponsive: If the touch screen on the case is unresponsive, try restarting the case by closing and reopening the lid.
Specifications
| Feature | Detail |
|---|---|
| Model Name | U9 |
| Connectivity Technology | Wireless (Bluetooth 5.4) |
| Noise Control | Active Noise Cancellation (ANC), Environmental Noise Cancellation (ENC), Transparency Mode |
| Audio Driver Type | 14.2mm Bio-Carbon Fiber Dynamic Driver |
| Battery Life (Earbuds) | 6-8 Hours |
| Total Playtime (with Case) | Up to 48 Hours |
| Charging Time (Case) | 1.5 Hours |
| Control Type | Touch Control (Earbuds & Case Touch Screen) |
| Water Resistance Level | IPX7 Waterproof |
| Compatible Devices | iOS, Android, and other Bluetooth-enabled devices |
| Item Weight | 3.52 ounces |
Official Product Video
Video: An official overview of the Thunelec Touch Screen Wireless Earbuds, demonstrating key features like the touch screen interface, sound quality, noise cancellation, and comfortable fit.
Warranty and Support
For warranty information, technical support, or any inquiries regarding your Thunelec U9 Wireless Earbuds, please refer to the contact details provided in the included User Manual or visit the official Thunelec website. Keep your purchase receipt for warranty claims.