COSLUS Mini Water Flosser T40 Instruction Manual
Comprehensive guide for setup, operation, and maintenance of your COSLUS Mini Water Flosser T40.
1. Product Overview
The COSLUS Mini Water Flosser T40 is a portable, cordless oral irrigator designed for effective on-the-go oral care. Its compact design and multiple features make it suitable for various users, including those with braces or sensitive teeth.
Package Contents
- COSLUS Mini Water Flosser T40 Unit
- 2 x Standard Jet Tips
- 1 x Orthodontic Jet Tip
- 1 x Tongue Cleaner Tip
- Type-C Charging Cable (adapter not included)
- Travel Pouch
Key Features
- Ultra-Portable Design: Lightweight and compact, comparable to common smartphones, ideal for travel and daily commuting.
- Detachable Wide-Mouth Tank: Easy to clean, dry, and refill, preventing scale buildup.
- Integrated Nozzle Storage: Built-in space on top for organized and clean nozzle storage during travel.
- 4 Adjustable Modes: Offers Soft, Normal, Power, and Pulse modes (30-140 PSI) for personalized cleaning.
- IPX7 Waterproof: Designed for use in wet environments like showers or outdoors.
- Long Battery Life: Up to 30 days of use on a single 3-hour Type-C charge.

Figure 1: COSLUS Mini Water Flosser T40 and included accessories, including various jet tips and charging cable.
2. Safety Information
- Always unplug or turn off the device when not in use.
- Do not charge in the bathroom or in a humid environment.
- Always follow the instructions that came with the device.
- For optimal results, replace the jet tips every 2-3 weeks.
- Avoid using the device with hot water or near heat sources.
3. Setup and Charging
Initial Charge
Before first use, fully charge the device. The COSLUS Mini Water Flosser T40 features a Type-C charging port for fast charging.
- Ensure the charging port is dry to avoid issues.
- Connect the provided Type-C charging cable to the device and a suitable power adapter (not included).
- A full charge takes approximately 3 hours and provides up to 30 days of battery life, depending on usage.
Video 1: Demonstrates the compact size and charging of the COSLUS Mini Water Flosser T40.
Filling the Water Tank
The device features a detachable wide-mouth tank for easy filling and cleaning.
- Open the lid on top of the device.
- Fill the detachable water tank with water. The wide-mouth design allows for quick and easy refills.
- Close the lid securely.

Figure 2: Illustration of the wide-mouth detachable water tank, highlighting ease of cleaning and refilling.
Video 2: Demonstrates the detachable wide-mouth tank for easy cleaning and quick refills.
Attaching a Nozzle
The device comes with 4 multi-functional nozzles for various oral care needs.
- 2 x Standard Jet Tips: For daily teeth cleaning.
- 1 x Orthodontic Jet Tip: Gentle on sensitive gums, suitable for braces wearers.
- 1 x Tongue Cleaner Tip: For effective removal of food debris and tongue cleaning.
- Select the desired jet tip.
- Insert the selected tip into the nozzle opening on top of the device until it clicks into place.

Figure 3: Display of the four multi-functional nozzles: Standard, Orthodontic, and Tongue Cleaner tips.
4. Operating Instructions
To use the COSLUS Water Flosser, follow these steps:
- Fill the detachable water tank with water and attach the desired nozzle.
- Select one of the 4 cleaning modes and adjust the water pressure using the mode button.
- Lean over the sink and place the tip in your mouth, pointing it at your teeth.
- Turn on the device using the power button.
- Move the tip along your teeth and gums in a gentle, circular motion.
Adjustable Modes (30-140 PSI)
The device offers 4 intensity levels to meet personalized needs:
- Soft Mode: For sensitive teeth, new users, children, or seniors.
- Normal Mode: For regular daily cleaning and oral care.
- Power Mode: For effective cleaning, braces, orthodontic care, and stain removal.
- Pulse Mode: Adjustable intensity for deep cleaning and gum massage.

Figure 4: Display of the 4 adjustable pressure modes: Soft, Normal, Power, and Pulse.
Video 3: Shows the COSLUS Mini Water Flosser T40 in use, demonstrating its portable oral irrigation.
5. Maintenance
Cleaning the Device
- After each use, remove the tip and store it in the nozzle storage space.
- Clean the unit by rinsing it with water and drying it with a clean cloth.
- The detachable wide-mouth water tank can be easily removed for thorough cleaning and drying, preventing scale buildup.

Figure 5: The COSLUS Mini Water Flosser T40 is IPX7 waterproof, allowing for easy cleaning and use in wet environments.
Nozzle Replacement
For optimal hygiene and performance, it is recommended to replace jet tips every 2-3 weeks.

Figure 6: The built-in nozzle storage keeps tips organized and clean, reducing loss and damage during travel.
6. Troubleshooting
If you encounter any issues with your COSLUS Mini Water Flosser T40, please refer to the following common solutions:
- No water flow: Ensure the water tank is filled and the nozzle is securely attached. Check if the water intake tube is clear.
- Weak water pressure: Verify the device is fully charged. Select a higher intensity mode.
- Device not turning on: Ensure the device is fully charged. If the issue persists, contact customer support.
- Accidental activation: Be mindful of the power button placement. Some users find it helpful to store the device with the nozzle detached or in its travel pouch to prevent accidental activation.
For further assistance, please contact COSLUS customer support.
7. Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 6.57 x 2.55 x 1.49 inches |
| Weight | 7.36 ounces |
| Model Number | T40 |
| Power Source | Battery Powered (Type-C Rechargeable) |
| Water Pressure Range | 30-140 PSI |
| Waterproof Rating | IPX7 |
| Battery Life | Up to 30 days on a single charge |
| Charging Time | Approximately 3 hours |
| Nozzle Diameter | 0.6 mm water flow |
8. Warranty and Support
The COSLUS Mini Water Flosser T40 is designed for durability with a target service life of up to 3 years. It typically comes with a 24-month warranty. For warranty claims, technical support, or any product-related inquiries, please contact COSLUS customer service through their official channels or the retailer where the product was purchased.





