Introduction
Thank you for choosing the Sejoy Cordless Water Flosser. This device is designed to provide effective oral hygiene by removing plaque and food debris from between teeth and below the gumline, promoting healthier gums and fresher breath. Please read this manual thoroughly before first use to ensure safe and optimal operation.
Important Safety Precautions
- Do not immerse the device in water for extended periods. The device is IPX7 waterproof, suitable for showering, but not for prolonged submersion.
- Keep out of reach of children.
- Do not direct water spray under the tongue, into the ear, nose, or other sensitive areas.
- Use only water or dentist-recommended mouthwash in the reservoir. Do not use corrosive or abrasive cleaning agents.
- Ensure the charging port cover is securely closed before use to maintain water resistance.
- If you have any medical conditions or concerns, consult your dentist before using this product.
Package Contents
Verify that all items are present in your package:
- 1 x Sejoy Cordless Water Flosser Unit
- 1 x Instruction Manual
- 1 x DC Charging Cable
- 5 x Standard Nozzles
- 1 x Orthodontic Nozzle
- 1 x Tongue Scraper
- 1 x Periodontal Pocket Nozzle

Image: Package contents of the Sejoy Cordless Water Flosser, including the main unit, manual, charging cable, and various nozzles.

Image: A visual representation of the 8 specialized nozzles provided with the water flosser, designed for different oral care needs.
Product Components
Familiarize yourself with the parts of your Sejoy Cordless Water Flosser:

Image: Labeled diagram illustrating the various components of the water flosser, such as the nozzle, control buttons, indicators, and charging port.
- Nozzle: Directs the water stream.
- On/Off Button: Powers the device on or off.
- Mode Button: Cycles through different cleaning modes.
- Charging Indicator: Shows battery charging status.
- Mode Indicator: Displays the currently selected cleaning mode.
- DC Charging Port: For connecting the charging cable.
- Nozzle Release Button: Press to detach the nozzle.
- Water Tank: Holds water for flossing (300ml capacity).
Setup
1. Charging the Device
Before first use, fully charge the water flosser. Connect the DC charging cable to the charging port on the device and plug the other end into a suitable USB power adapter (not included). The charging indicator will show the charging status. A full charge typically takes several hours.
2. Attaching a Nozzle
Select the desired nozzle. Insert the nozzle into the opening at the top of the flosser until it clicks into place. Ensure it is firmly seated.
3. Filling the Water Tank
Open the water tank cover located at the bottom or side of the device. Fill the 300ml tank with lukewarm water. Close the cover securely to prevent leakage.

Image: The water flosser with its 300ml water tank, demonstrating its capacity.
Operating Instructions
1. Selecting a Mode
Press the Mode button to cycle through the available cleaning modes. The mode indicator will show the selected mode. The device offers the following modes:
- Soft (70-110psi): For gentle cleaning of sensitive gums.
- Normal (25-60psi): For regular cleaning and gum massage.
- Shoot (20-110psi): For targeted cleaning and gum massage.
- Custom (60-110psi): Allows customization of force cycle to find the right water pressure for sensitive gums or first-time users.

Image: Visual display of the four distinct operating modes and their respective pressure ranges.
2. Using the Water Flosser
- Lean over a sink and place the nozzle tip into your mouth, aiming it at your gumline.
- Press the On/Off button to start the water flow.
- Guide the water stream along your gumline, pausing briefly between teeth.
- Allow the water to flow into the sink.
- Continue until you have cleaned all areas of your mouth.
- Press the On/Off button again to turn off the device.
Maintenance
1. Cleaning the Water Tank
After each use, empty any remaining water from the tank. The tank can be detached and rinsed thoroughly with clean water. For deeper cleaning, use a soft brush and mild soap, then rinse completely.

Image: Instructions for easy cleaning of the 300ml water tank under a faucet.
2. Cleaning the Nozzles
Rinse nozzles under running water after each use. For thorough cleaning, soak them in a solution of 2 parts water to 1 part white vinegar for 5-10 minutes, then rinse well.
3. Nozzle Replacement
Standard nozzles are recommended to be replaced every 6 months. Specialized nozzles (orthodontic, tongue scraper, periodontal pocket) are recommended to be replaced every 3 months for optimal hygiene and performance.
4. Storing the Device
Ensure the device is clean and dry before storing. Store it in a cool, dry place away from direct sunlight.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on. | Low battery or no charge. | Charge the device fully. |
| Weak water pressure. | Low battery, clogged nozzle, or incorrect mode. | Charge the device. Clean or replace the nozzle. Select a higher pressure mode. |
| Water leakage. | Water tank cover not closed properly or nozzle not seated correctly. | Ensure the water tank cover is securely closed. Re-insert the nozzle until it clicks. |
| Device stops during use. | Water tank empty or low battery. | Refill the water tank. Charge the device. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Sejoy |
| Model Number | CYQ-F5037-BLA |
| Power Source | Battery Powered |
| Special Feature | Portable |
| Product Benefits | Gum Health |
| Unit Count | 1 Count |
| Color | Black |
| Tank Capacity | 300 Milliliters |
| Manufacturer | JOYTECH Healthcare Co.,Ltd. |
| Dimensions | 24.7 x 10.2 x 8.7 cm; 480 grams |
| GTIN (UPC) | 06942284600047 |
Warranty and Support
For warranty information or technical support, please refer to the contact details provided on the product packaging or visit the official Sejoy website. Keep your purchase receipt as proof of purchase for any warranty claims.





