1. Product Overview
The Cillso H97 Wireless Earbuds are designed to provide a high-quality audio experience with advanced features. This manual will guide you through the setup, operation, and maintenance of your earbuds.

Image: Cillso H97 Wireless Earbuds and their charging case, showcasing the sleek design.
2. Package Contents
- Cillso H97 Wireless Earbuds (Left and Right)
- Charging Case
- USB-C Charging Cable
- User Manual
3. Setup
3.1 Initial Charging
Before first use, fully charge the earbuds and the charging case. The charging case features a dual LED battery display, showing the battery percentage of each earbud in real-time. The charging case fully charges in approximately 1.5 hours.
- Connect the provided USB-C charging cable to the charging port on the case and to a standard charger (5V/1A or 5V/2A).
- The LED display will indicate charging progress.
- For optimal performance, ensure the earbuds are fully charged before their first use, which provides up to 4 hours of call time.

Image: The Cillso H97 charging case with its dual LED display indicating battery levels for both earbuds and the case itself.
3.2 Pairing with Your Device
The H97 earbuds utilize an advanced Bluetooth 5.4 chip for stable and efficient connections.
- Ensure the earbuds are charged.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device (smartphone, tablet, laptop), enable Bluetooth.
- Search for available Bluetooth devices and select "H97" from the list.
- Once connected, the earbuds will automatically pair with your device whenever the case is opened, provided Bluetooth is enabled on your device. The connection range is up to 15 meters.

Image: A visual representation of the upgraded Bluetooth 5.4 chip, highlighting benefits such as stable connection, longer range, lower power consumption, and reduced latency.
4. Operating Instructions
4.1 Smart Touch Control
The H97 earbuds feature high-precision touch sensors for easy control of various functions.
- Play/Pause: Double tap the left or right earbud.
- Answer/End Call: One tap the left or right earbud.
- Next Song: Long press the right earbud for 2 seconds.
- Previous Song: Long press the left earbud for 2 seconds.
- Activate Voice Assistant: (Specific gesture not provided, typically a triple tap or long press on one earbud. Refer to the image for visual cues if available.)
- Volume Control: (Specific gesture not provided. Refer to the image for visual cues if available.)

Image: A diagram illustrating the touch control functions on the earbuds, including gestures for play/pause, answering calls, and skipping tracks.
4.2 Audio Quality and Calls
The earbuds feature 14.2mm diaphragm drivers and AAC/SBC audio encoding for immersive sound. Equipped with 4 ENC (Environmental Noise Cancelling) microphones, they effectively filter out 85% of background noise for clear calls.

Image: An exploded view diagram of the earbud's internal structure, highlighting the 13mm diameter speaker and components responsible for Hi-Fi stereo sound.

Image: A transparent view of an earbud showing the placement of four microphones designed for crystal-clear calls and effective background noise suppression.
5. Maintenance
5.1 Water Resistance
The H97 earbuds feature IP7 nano-coating technology, making them resistant to daily splashes, sweat, and rain. This protection allows for use during workouts or in light rain conditions.

Image: A woman with water splashing on her face while wearing an earbud, demonstrating the IPX7 waterproof capability against water, sweat, and rain.
5.2 Charging Best Practices
Always use a standard 5V/1A or 5V/2A charger for the charging case. Using incompatible chargers may damage the device or affect charging efficiency.
5.3 Cleaning
To maintain optimal sound quality and hygiene, regularly clean your earbuds. Use a soft, dry, lint-free cloth to wipe the earbuds and charging case. Avoid using abrasive materials or harsh chemicals.
6. Troubleshooting
6.1 Connectivity Issues
- Earbuds not pairing: Ensure both earbuds are in the charging case, then open the lid. Check that Bluetooth is enabled on your device. If issues persist, try forgetting the device in your phone's Bluetooth settings and re-pairing.
- Intermittent connection: Ensure you are within the 15-meter Bluetooth range. Avoid physical obstructions between the earbuds and your device.
6.2 Charging Problems
- Case not charging: Verify the USB-C cable is securely connected to both the case and the power adapter. Ensure the power adapter is a standard 5V/1A or 5V/2A model and is functioning correctly.
- Earbuds not charging in case: Ensure the earbuds are properly seated in the charging slots. Clean the charging contacts on both the earbuds and the case with a dry cotton swab to remove any debris.
6.3 Sound Quality Issues
- Low volume or distorted sound: Check the volume levels on both your device and the earbuds. Ensure the earbuds are clean and free from earwax buildup.
- Lack of noise cancellation: Ensure the earbuds are properly seated in your ears to create a good seal. Refer to the earbud fit diagram for optimal placement.

Image: A diagram illustrating the recommended angles (90-degree and 60-degree) for proper earbud placement within the ear canal to ensure a secure fit and optimal sound.
6.4 Earbud Fit
The H97 earbuds feature a semi-in-ear ergonomic design. If you experience discomfort or if the earbuds feel loose, try adjusting their position in your ear. Proper fit is crucial for both comfort and sound performance.
7. Specifications
| Brand | Cillso |
| Model Number | H97 |
| Bluetooth Version | 5.4 |
| Bluetooth Range | 15 Meters |
| Earbud Playback Time | Up to 8 hours (single charge) |
| Total Playtime (with Case) | Up to 40 hours |
| Charging Time (Case) | 1.5 hours |
| Water Resistance | IP7 |
| Audio Driver Size | 14.2 mm |
| Noise Control | Environmental Noise Cancellation (ENC) |
| Control Type | Touch Control |
| Earbud Weight | 3.5 grams (each) |
| Charging Case Weight | 32 grams |
| Compatible Devices | iOS 9.0+/Android 5.0+ with Bluetooth 4.0+ |
8. Product Video
Video: An official product video from Harson-US providing an overview of the Cillso H97 Wireless Earbuds, demonstrating key features and design.
9. Warranty and Support
9.1 Warranty Information
Your Cillso H97 Wireless Earbuds are covered by a 30-day refund/replacement policy from the date of purchase. Please retain your proof of purchase for warranty claims.
9.2 Customer Support
For any questions, technical assistance, or warranty claims, please contact Cillso customer service. You can find more information and contact details on the official Cillso store page: Cillso Store.