1. Setup
1.1 Initial Charging
Before first use, ensure the earbuds and charging case are fully charged. Connect the charging case to a standard charger (5V/1A or 5V/2A) using the provided USB-C cable. The charging case fully charges in approximately 1.5 hours. The independent LED display on the case will show the battery level and charging status in real-time.

Image: The charging case with earbuds inserted, showing the LED display indicating battery percentage and charging status. A USB-C cable is connected for charging.
1.2 Pairing with Your Device
The Cillso H97 Wireless Earbuds feature an advanced Bluetooth 5.4 chip and a built-in Hall sensor for automatic pairing. Simply open the charging case, and the earbuds will automatically enter pairing mode and connect to the last paired device within 15 meters. If connecting for the first time, ensure Bluetooth is enabled on your device and select 'H97' from the list of available devices.
Video: This video demonstrates the one-step pairing process of the H97 Wireless Earbuds with a mobile device. It shows the earbuds automatically connecting when the case is opened.

Image: A diagram illustrating how to use the earbuds in single earbud mode or binaural mode, showing the connection to a smartphone's Bluetooth settings.
2. Operation
2.1 Touch Controls
The H97 earbuds feature high-precision touch sensors for easy control of various functions. Refer to the diagram below for specific touch commands:
- Play/Pause: Double tap the left or right MFB button.
- Volume Up: One tap the right MFB button.
- Volume Down: One tap the left MFB button.
- Next Song: Long press the right MFB button for 2 seconds.
- Previous Song: Long press the left MFB button for 2 seconds.
- Answer/End Call: One tap the left or right MFB button.
- Reject Call: Long press the left or right MFB button for 2 seconds.
- Activate Voice Assistant: Triple tap the right MFB button.

Image: A detailed diagram illustrating the touch control functions on the earbuds, including play/pause, volume, track skipping, call management, and voice assistant activation.
2.2 Audio Features
The earbuds are equipped with 13mm diaphragm drivers and support AAC/SBC audio codecs, delivering a balanced sound profile with deep bass (20Hz) and clear mids and highs (20kHz). The unique stereo design adapts to various music genres for an immersive listening experience.

Image: An exploded view of an earbud, highlighting the 13mm dynamic driver and other internal components responsible for Hi-Fi stereo sound.
2.3 Call Quality
Integrated with 4 Environmental Noise Cancelling (ENC) microphones, these earbuds effectively reduce up to 85% of background noise. This ensures crystal-clear and detailed call quality, even in noisy environments.

Image: A diagram illustrating the placement and function of the four microphones within the earbud, designed for crystal-clear calls and anti-wind noise suppression.
2.4 Battery Life
The earbuds provide up to 8 hours of playback on a single charge. With the fully charged charging case, the total playback time extends to 40 hours. The charging case's LED display allows for real-time monitoring of battery levels.

Image: An image displaying the earbuds' compatibility with various devices such as phones, tablets, laptops, and desktops.
2.5 Ergonomic Design
Designed for comfort, the earbuds feature a semi-in-ear ergonomic design with airflow technology to reduce ear canal pressure. Medical-grade gel tips ensure a secure and comfortable fit. Each earbud weighs only 3.5 grams, and the charging case weighs 32 grams, making them lightweight and portable.

Image: A diagram illustrating the ergonomic fit of the earbud within the ear canal, highlighting the comfortable angles for secure placement.

Image: A person wearing the earbuds while using a mobile phone outdoors, demonstrating the comfortable and lightweight design.
3. Maintenance
3.1 Water Resistance
The earbuds feature an IPX7 nano-coating, providing protection against sweat, rain, and splashes. This makes them suitable for various activities, including workouts and outdoor use. Avoid submerging the earbuds in water for extended periods.

Image: The earbuds are shown being splashed with water, emphasizing their IPX7 waterproof rating for protection against sweat, rain, and splashes.
3.2 Charging Best Practices
To ensure optimal charging and prolong battery life, always use a standard charger (5V/1A or 5V/2A) for the charging case. If you experience any charging issues, try switching to a certified standard charger.
3.3 Over Current Protection (OCP)
This product is equipped with OCP technology to prevent issues such as overheating, melting, or fire caused by prolonged high current from an external power source charging the case. When the current exceeds the power limit, the power source will immediately cut off output to protect the circuitry and device.

Image: An illustration explaining OCP (Over Current Protection) technology, showing how it safeguards the device from high current damage.
4. Troubleshooting
4.1 Connectivity Issues
- Ensure the earbuds are charged.
- Make sure Bluetooth is enabled on your device.
- Place the earbuds back into the charging case, close the lid, then open it again to re-initiate pairing.
- If the earbuds do not automatically connect, manually select 'H97' from your device's Bluetooth settings.
- If issues persist, try forgetting the device ('H97') from your phone's Bluetooth list and re-pairing.
4.2 Charging Problems
- Verify that the charging cable is securely connected to both the case and the power adapter.
- Ensure the power adapter is a standard 5V/1A or 5V/2A charger.
- Try using a different certified standard charger and USB-C cable.
- Clean the charging contacts on both the earbuds and inside the case with a dry cotton swab to remove any dust or debris.
5. Specifications
| Brand | Cillso |
| Model Number | H97 |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.4 |
| Bluetooth Range | 15 Meters |
| Ear Placement | In Ear |
| Noise Control | Environmental Noise Cancellation (ENC) |
| Audio Driver Size | 13mm (Feature Bullet) / 14.2mm (Specification) Dynamic Driver |
| Frequency Response | 20Hz - 20kHz |
| Sensitivity | 110 dB |
| Impedance | 32 Ohms |
| Control Method | Touch |
| Earbud Weight | 3.5 Grams (each) |
| Charging Case Weight | 32 Grams |
| Earbud Playback Time | Up to 8 Hours |
| Total Playback Time (with case) | Up to 40 Hours |
| Charging Case Charge Time | 1.5 Hours |
| Water Resistance Level | IPX7 Waterproof |
| Compatible Devices | Android 4.4+, iOS 8.0+, Bluetooth 4.0+ devices |
6. Warranty & Support
6.1 Warranty Information
The Cillso H97 Wireless Earbuds come with a 30-day return policy and 180 days of 24-hour customer service. For any issues or inquiries, please contact customer support.
6.2 Customer Support
For assistance, please refer to the contact information provided with your product packaging or visit the official Cillso website.





