Introduction
Thank you for choosing the YUNCHI YCDZ-Y7 Sonic Electric Toothbrush. This manual provides essential information for the safe and effective use of your new toothbrush. Please read it thoroughly before first use and keep it for future reference.
The YUNCHI YCDZ-Y7 features advanced sonic technology with 40,000 VPM, 5 brushing modes, a smart timer, and a long-lasting USB-C rechargeable battery, designed for comprehensive oral care for both adults and children.
Safety Information
Important Safety Reminders:
- Do not use the toothbrush for any purpose other than cleaning teeth.
- Keep the toothbrush out of reach of children who may swallow parts or insert it deeply into their mouth, which could cause injury or choking. Adult supervision is always required when children use the toothbrush.
- Change the toothbrush head every 3-4 months, or more frequently if the head appears damaged or worn.
- Do not disassemble or attempt to repair the toothbrush yourself. Contact customer support for assistance.
- Ensure the USB-C port cover is securely closed before rinsing the toothbrush or using it in wet environments.
Package Contents
Verify that all items are present in the package:
- 1 x YUNCHI YCDZ-Y7 Toothbrush Handle
- 8 x Replacement Brush Heads
- 1 x USB-C Charging Cable
- 1 x Travel Case
- 1 x User Manual (this document)

Image: The YUNCHI YCDZ-Y7 toothbrush inside its travel case, alongside eight replacement brush heads, indicating a 24-month supply.
Setup
1. Charging the Toothbrush
- Before first use, fully charge the toothbrush.
- Locate the USB-C charging port at the bottom of the toothbrush handle. Gently open the protective cover.
- Connect the provided USB-C charging cable to the port and plug the other end into a compatible USB power adapter (not included).
- The indicator light will show charging status. A full charge typically takes about 4 hours and provides up to 45 days of use (based on 2 minutes, twice daily).
- Once fully charged, disconnect the cable and securely close the USB-C port cover to maintain IPX7 waterproof integrity.

Image: Close-up of the toothbrush base showing the USB-C charging port and charging cable connected, highlighting 45 days battery life and 4-hour full charge.
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 it is securely attached.
Operating Instructions
1. Powering On/Off and Changing Modes
- Press the power button once to turn on the toothbrush. It will start in the last used mode due to the smart memory function.
- Press the power button repeatedly within 5 seconds to cycle through the 5 brushing modes: White, Clean, Sensitive, Polish, and Massage.
- To turn off the toothbrush, press and hold the power button for 2 seconds, or press the power button after cycling through all modes.

Image: The YUNCHI YCDZ-Y7 toothbrush handle displaying the five brushing modes: White, Clean, Sensitive, Polish, and Massage, with descriptions of each mode.
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. Gently move the brush head slowly across your teeth, allowing the sonic vibrations to do the cleaning. Do not scrub aggressively.
- The toothbrush features a 2-minute smart timer and 30-second interval reminders. It will pause briefly every 30 seconds to signal you to move to a different quadrant of your mouth. After 2 minutes, the toothbrush will automatically turn off.

Image: A person holding the YUNCHI YCDZ-Y7 toothbrush, with an overlay illustrating the 2-minute smart timer and 30-second quadrant reminders for balanced brushing.

Image: Illustration of the toothbrush head demonstrating 40,000 VPM sonic vibrations for deep cleaning.
Maintenance
1. Cleaning the Toothbrush
- After each use, rinse the brush head thoroughly under running water while the toothbrush is still on to remove any remaining toothpaste and debris.
- Turn off the toothbrush and remove the brush head. Rinse both the brush head and the handle separately under running water.
- Wipe the handle with a soft cloth to dry it. Ensure the USB-C port cover is closed.
- The YUNCHI YCDZ-Y7 is IPX7 waterproof, allowing it to be safely rinsed under water or used in the shower.

Image: The YUNCHI YCDZ-Y7 toothbrush submerged partially in water, illustrating its IPX7 waterproof rating for safe use in wet environments.
2. Replacing Brush Heads
- For optimal hygiene and brushing performance, replace the brush head every 3-4 months.
- The blue indicator bristles on the brush head will fade over time, signaling that it's time for a replacement.
- To remove, firmly pull the brush head straight off the handle. To attach a new one, follow the instructions in the "Setup" section.

Image: Detailed view of the U-shaped brush head bristles, showing rounded tips for gentle cleaning and blue fading bristles as an indicator for replacement.
3. Storage
- Store the toothbrush and brush heads in a clean, dry place.
- Use the provided travel case for hygienic storage and protection when traveling.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Toothbrush does not turn on. | Battery is depleted. | Charge the toothbrush fully (approx. 4 hours). |
| Weak vibrations or reduced performance. | Low battery. Worn brush head. | Recharge the toothbrush. Replace the brush head. |
| Charging indicator not lighting up. | Cable not properly connected. Faulty charger/cable. | Ensure cable is securely connected. Try a different USB power source or cable. |
| Brush head feels loose. | Brush head not fully attached. | Push the brush head down firmly until it clicks into place. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | YCDZ-Y7 |
| Brand | YUNCHI |
| Sonic Vibrations | Up to 40,000 VPM |
| Brushing Modes | 5 (White, Clean, Sensitive, Polish, Massage) |
| Power Source | Rechargeable Lithium-ion Battery |
| Charging Time | Approx. 4 hours (USB-C) |
| Battery Life | Up to 45 days (2 mins/session, twice daily) |
| Waterproof Rating | IPX7 |
| Bristle Material | Nylon |
| Item Firmness | Soft |
| Package Dimensions | 24.4 x 14.2 x 3.9 cm |
| Weight | 350 grams |
Warranty and Support
For warranty information or product support, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your proof of purchase for any warranty claims.
If you experience any issues not covered in the troubleshooting section, please reach out to YUNCHI customer service through the platform where you purchased the product.