1. Important Safety Information
Please read all instructions carefully before using the YUNCHI C3 Sonic Electric Toothbrush. Keep this manual for future reference.
- Ensure the charging port is completely dry before connecting the charging cable.
- This product is designed for oral hygiene. Do not use it for any other purpose.
- Keep out of reach of children and individuals with reduced physical, sensory, or mental capabilities unless supervised.
- Do not disassemble or attempt to repair the toothbrush. Contact customer support for assistance.
- If you experience any discomfort or pain while using the toothbrush, discontinue use and consult a dental professional.
Legal Disclaimer
Statements regarding this product have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition. This product is intended for personal oral hygiene use.
2. Product Overview
The YUNCHI C3 Sonic Electric Toothbrush is designed to provide an effective and comfortable brushing experience with its high-speed motor and multiple cleaning modes.

Figure 2.1: YUNCHI C3 Sonic Electric Toothbrush components including handle, brush heads, travel case, and packaging.
Key Features:
- 44,000 VPM High-Speed Motor: Delivers powerful sonic vibrations for deep cleaning.
- 5 Cleaning Modes: White, Clean, Soft, Polish, and Gum Care for various oral needs.
- 2-Minute Smart Timer with 30-Second Reminders: Ensures dentist-recommended brushing time and even cleaning across all mouth quadrants.
- IPX7 Waterproof Design: Allows for safe use in the shower and easy rinsing.
- Long Battery Life: Up to 90 days on a single 3-hour charge (based on 2 uses/day).
- 8 DuPont Brush Heads: W-shaped bristles designed for effective cleaning and gentle gum care, providing up to 2 years of use.
- Travel Case: Included for convenient and hygienic portability.

Figure 2.2: Detailed view of the YUNCHI C3 handle highlighting the 44,000 VPM motor, 2-minute smart timer, and the five distinct brushing modes.
3. Setup and Initial Use
3.1 Charging the Toothbrush
- Ensure the charging port at the bottom of the toothbrush handle is dry.
- Open the protective cover of the Type-C charging port.
- Connect the provided Type-C USB cable to the toothbrush and a compatible USB power adapter (not included).
- The indicator light will flash red during charging. A full charge typically takes 3-4 hours.
- Once fully charged, the indicator light will turn solid green.
- Disconnect the charging cable and securely close the protective cover to maintain IPX7 waterproof rating.
Note: A full charge provides up to 90 days of use (based on two 2-minute brushing sessions per day).

Figure 3.1: The Type-C charging port located at the base of the YUNCHI C3 toothbrush handle, illustrating its long battery life.
3.2 Attaching a Brush Head
- Align the brush head with the metal shaft on the toothbrush handle.
- Push the brush head down firmly until it clicks into place.
- Ensure the brush head is securely attached before use.
Video 3.1: A demonstration of attaching the brush head to the YUNCHI C3 Sonic Electric Toothbrush and cycling through its various modes.
4. Operating Instructions
4.1 Power On/Off and Mode Selection
- Press the power button once to turn on the toothbrush. It will start in the last used mode.
- Press the mode button (below the power button) repeatedly to cycle through the 5 cleaning modes: White, Clean, Soft, Polish, Gum Care.
- To turn off the toothbrush, press and hold the power button for 2 seconds, or press the power button once after cycling through all modes.

Figure 4.1: Explanation of the five distinct brushing modes and their intended benefits for oral health.
4.2 Brushing Technique
- Wet the bristles and apply a small amount of toothpaste.
- Place the brush head against your teeth at a slight angle towards the gum line.
- Press the power button to start brushing.
- Gently move the brush head slowly across your teeth, allowing the sonic vibrations to clean. Avoid scrubbing vigorously.
- The 2-minute smart timer will pause briefly every 30 seconds to indicate when to move to a different quadrant of your mouth (upper right, upper left, lower right, lower left).
- The toothbrush will automatically turn off after 2 minutes.

Figure 4.2: Visual representation of the 2-minute smart timer and 30-second interval reminders for guided brushing.
5. Maintenance
5.1 Cleaning the Toothbrush
- After each use, rinse the brush head thoroughly under running water.
- Wipe the toothbrush handle with a soft, damp cloth. Do not use abrasive cleaners or harsh chemicals.
- The toothbrush is IPX7 waterproof, allowing it to be rinsed under running water or used in the shower.

Figure 5.1: The YUNCHI C3 toothbrush is fully IPX7 waterproof, making it safe for use and rinsing in wet conditions.
5.2 Replacing Brush Heads
It is recommended to replace the brush head every 3 months, or sooner if the bristles become frayed or worn. The W-shaped DuPont bristles are designed to fade in color to indicate when a replacement is needed.
- Grip the brush head firmly and pull it straight off the handle.
- Align a new brush head with the metal shaft and push it down until it clicks into place.

Figure 5.2: The YUNCHI C3 package includes eight DuPont brush heads, providing replacements for up to two years, along with a premium travel case.
6. Troubleshooting
- Toothbrush does not turn on: Ensure the battery is charged. If the red indicator flashes, the battery level is low and requires recharging.
- Weak vibrations: The battery may be low. Recharge the toothbrush.
- Brush head feels loose: Ensure the brush head is pushed down firmly onto the metal shaft until it clicks.
- Charging issues: Verify the Type-C cable is correctly inserted and the charging port is dry. Try a different USB power adapter.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | C3 |
| Motor Speed | 44,000 Vibrations Per Minute (VPM) |
| Cleaning Modes | 5 (White, Clean, Soft, Polish, Gum Care) |
| Smart Timer | 2-minute auto-off with 30-second interval reminders |
| Waterproof Rating | IPX7 |
| Battery Type | Lithium Ion (included) |
| Charging Time | 3-4 hours |
| Battery Life | Up to 90 days (2 uses/day) |
| Brush Head Type | DuPont W-shaped bristles (Medium firmness) |
| Product Dimensions | 9.45 x 6.89 x 1.5 inches |
| Item Weight | 10.86 ounces |
| Manufacturer | YUNCHI |
8. Warranty and Support
For warranty information or technical support, please refer to the product packaging or contact YUNCHI customer service through the retailer where the product was purchased. Keep your proof of purchase for any warranty claims.
For additional information or assistance, please visit the YUNCHI Store on Amazon.