1. Introduction
The Timekettle W4 Pro AI Interpreter Earbuds are designed to break down language barriers, offering seamless and natural communication across various scenarios. This manual provides detailed instructions on setting up, operating, maintaining, and troubleshooting your W4 Pro earbuds to ensure optimal performance.

Figure 1: Timekettle W4 Pro Earbuds and Charging Case
2. What's in the Box
- Timekettle W4 Pro Earbuds (Left & Right)
- Charging Case
- USB-C Charging Cable
- User Manual

Figure 2: Packaging contents of the W4 Pro
3. Setup Guide
3.1 Initial Activation & Charging
- Unpack: Carefully remove the earbuds and charging case from the packaging.
- Remove Insulation: Before first use, remove the small insulation sheets from the charging contacts of both earbuds.
- Activate: Place the earbuds back into their respective slots in the charging case. Close the charging case for 2 seconds, then open it. The earbuds' indicator lights will flash alternately, indicating they are in connection waiting mode.
- Charge: Connect the charging case to a power source using the provided USB-C cable. Ensure the earbuds are fully charged before initial use.
3.2 Pairing with Your Device
- Download App: Download the Timekettle app from your device's app store (iOS or Android).
- Open App: Launch the Timekettle app on your smartphone.
- Select Device: In the app, select the 'W4 Pro' earbuds from the list of available devices.
- Bluetooth Connection: Follow the on-screen instructions to enable Bluetooth on your device and connect to 'Timekettle W4 Pro'. Once successfully connected, the earbud indicator lights will stop flashing.
Video 1: How to Use Timekettle W4 Pro? This video demonstrates the initial setup and pairing process for the earbuds.
3.3 Wearing the Earbuds
- Identify Ears: Distinguish between the left and right earbuds.
- Position: Bring the earbud close to your ear. Gently pull apart the ear hook and position it over your ear.
- Adjust: Rotate the earbud to ensure it sits comfortably and securely in the correct position. The open-ear design allows for comfort and awareness of your surroundings.
Video 2: How to quickly wear Timekettle W4 Pro? This video provides a quick guide on correctly wearing the earbuds.
4. Operating Modes
The Timekettle W4 Pro offers several operating modes tailored for different communication needs:
4.1 One-on-One Mode
This mode is ideal for direct, bidirectional simultaneous translation between two individuals. Each person wears one earbud, allowing for natural conversation flow.
- Select Mode: In the Timekettle app, tap 'One-on-One Mode'.
- Set Languages: Assign a language and accent for each earbud (e.g., one for English, one for Spanish).
- Share: Share one earbud with the other person. Begin speaking, and the earbuds will provide real-time translation.

Figure 3: One-on-One Mode in action
Video 3: One-on-One Mode Introduction of Timekettle W4 Pro Earbuds. This video illustrates how the one-on-one mode facilitates direct communication.
4.2 Listen & Play Mode
This mode is designed for listening to real-time translations of conversations or presentations, particularly useful in meetings or lectures. It also includes AI Memo for meeting summaries.
- Select Mode: In the Timekettle app, tap 'Listen & Play Mode'.
- Position Phone: Place your mobile phone close to the sound source (e.g., a speaker in a meeting).
- Set Languages: Select the language being spoken (for the phone to record) and your desired translation language (for the earbuds to play).
- Listen: Wear your earbud to hear the real-time translation. The app will also display the transcribed and translated content.
- Speak: To speak, tap 'Speak' in the app or single-touch the earbud. Your speech will be translated and played via your mobile phone's speaker.

Figure 4: Listen & Play Mode during a meeting
Video 4: Listening & Speaking Modes Introduction of Timekettle W4 Pro. This video explains how to use the listening and speaking functionalities.
Video 5: AI-generated Meeting Minutes of W4 Pro Interpreter Earbuds. This video demonstrates the AI summary feature for meetings.
4.3 Media Translation (Call & Video)
Translate audio from phone calls, video calls, or streaming media directly through your earbuds.
- Playback Source: For phone calls, ensure your device's playback source is set to 'Timekettle W4 Pro'. (Automatic on Android, manual selection on iOS).
- Select Mode: Open the Timekettle app and select 'Media Translation Mode'.
- Set Languages: Choose the recording language (e.g., English for the media) and your desired translation language (for the earbuds).
- Launch Media: Tap the icon in the lower left corner to launch your video or call app.
- Translate: Play the video or answer the call. You will hear the translated audio through your earbud, and the script will appear on your phone.

Figure 5: Media Translation for voice calls

Figure 6: Media Translation for video content
Video 6: Voice Call & Video Translation of Timekettle W4 Pro Earbuds. This video demonstrates how to translate during calls and video playback.
4.4 Offline Translation
The W4 Pro supports offline translation for 13 language pairs across 8 languages, allowing communication without an internet connection.
- Enable Offline: In the Timekettle app, toggle the 'Offline Translation' switch to ON.
- Download Language Packs: If you haven't already, tap 'Download Now' to download the required offline language packages. You typically get 2 free packages, with additional ones available for purchase.
- Use Modes: Offline translation is supported in 'One-on-One' and 'Listen & Play' modes.

Figure 7: Offline language packs available for download
Video 7: Offline Translation Introduction of Timekettle W4 Pro. This video explains how to enable and use offline translation.
5. Key Features
5.1 40 Languages & 93 Accents
The W4 Pro supports bidirectional simultaneous translation for 40 languages and 93 accents, ensuring comprehensive coverage for global communication.

Figure 8: Language and accent support
5.2 Triple Mic Noise Reduction
Equipped with an advanced triple microphone array, the W4 Pro utilizes vector noise reduction technology to isolate the user's voice, minimizing cross-talk and enhancing recognition accuracy even in noisy environments.

Figure 9: Triple Mic Noise Reduction technology
5.3 AI Semantic Segmentation Technology
This revolutionary technology allows the W4 Pro to intelligently split long sentences into shorter, more manageable segments, enabling quicker and smoother playback of accurate translations. This significantly reduces delays in long conversations.
Video 8: Timekettle Revolutionary AI Semantic Segmentation Tech. This video explains the underlying technology for faster translations.
5.4 Extended Battery Life
Enjoy up to 6 hours of continuous translation on a single charge. The charging case provides two additional earbud charges, extending total usage to up to 18 hours. The standby time is up to one year.
5.5 Innovative Open-Ear Design
The W4 Pro features an open-ear design that ensures comfort and hygiene, making sharing easy. It allows for clear sound in noisy environments while minimizing leakage, maintaining conversation privacy.

Figure 10: Open-Ear Design for comfort and awareness
6. Maintenance
6.1 Cleaning
- Use a soft, dry, lint-free cloth to clean the earbuds and charging case.
- Do not use abrasive cleaners, solvents, or spray cleaners.
- Avoid getting moisture in any openings.
6.2 Storage
- Always store the earbuds in their charging case when not in use to protect them and keep them charged.
- Store in a cool, dry place away from direct sunlight and extreme temperatures.
6.3 Battery Care
- Charge the earbuds and case regularly, even if not in frequent use, to maintain battery health.
- Avoid fully discharging the battery for extended periods.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds not connecting/charging | Insulation sheet not removed; improper placement in case; low battery; Bluetooth off. | Ensure insulation sheets are removed. Place earbuds correctly in the charging case. Charge the case and earbuds. Verify Bluetooth is enabled and paired. |
| Poor translation accuracy | Noisy environment; unclear speech; long sentences. | Speak clearly and at a moderate pace. Try to minimize background noise. Break down long sentences into shorter ones. Ensure app is updated. |
| No sound or low volume | Device volume too low; earbud not properly seated; app settings. | Increase volume on your mobile device. Adjust earbud position for a better fit. Check volume settings within the Timekettle app. |
| App freezing or crashing | Outdated app version; temporary software glitch. | Update the Timekettle app to the latest version. Close and restart the app. Restart your mobile device. |
8. Specifications
- Product Dimensions: 3.3 x 3.3 x 1.6 inches
- Item Weight: 15.2 ounces
- Batteries: 1 Lithium Polymer batteries required (included)
- Manufacturer: Timekettle
- First Available: August 16, 2024
9. Warranty and Support
Timekettle W4 Pro AI Interpreter Earbuds come with a standard manufacturer's warranty. For detailed warranty terms and conditions, please refer to the warranty card included in your product packaging or visit the official Timekettle website.
If you encounter any issues not covered in the troubleshooting section or require further assistance, please contact Timekettle Customer Support:
- Website: Timekettle Official Store
- Email: (Refer to product packaging or official website for specific email address)





