1. Introduction
Thank you for choosing the Simpeak 550ml Essential Oil Diffuser. This device is designed to provide a pleasant aromatic experience while humidifying and purifying the air in your space. Utilizing advanced ultrasonic technology, it operates quietly and safely, making it an ideal addition to any home or office environment. Please read this manual thoroughly before use to ensure proper operation and maintenance.
2. Safety Information
Warning:
- Avoid direct contact of undiluted essential oils with skin.
- Keep the device out of reach of children and pets.
- Ensure sufficient ventilation during use.
- Do not exceed the maximum water fill line.
- Only use the provided power adapter.
- Do not immerse the unit in water or other liquids.
- Unplug the device before cleaning or refilling.
3. Package Contents

Figure 3.1: Package Contents and Product Dimensions
This image provides a clear view of the diffuser's dimensions and lists all items included in the package: the aroma diffuser unit, a remote control, a measuring cup for water, a power adapter, a user manual, and a DIY sticker.
The package includes the following items:
- 1 x Simpeak Aroma Diffuser
- 1 x Remote Control (with CR2025 3V button battery included)
- 1 x Measuring Cup
- 1 x Power Adapter (Cable length: 1.5 m)
- 1 x User Manual
- 1 x DIY Sticker
Note: Essential oils are not included.
4. Product Features

Figure 4.1: Key Product Features
This image highlights the core functionalities of the Simpeak diffuser, including remote control operation, advanced ultrasonic technology for quiet misting, programmable timing options, adjustable mist output (large or small), a vibrant colorful light feature, and an automatic shut-off for safety.
- Remote Control: Operate all functions from a distance of up to 3 meters.
- Large Capacity: 550ml water tank provides up to 10 hours of continuous mist.
- BPA-Free Material: Safe for use around children and pregnant women.
- Ultrasonic Technology: Operates quietly (approx. 35dB) with 2.4 MHz frequency for fine mist atomization.
- Adjustable Mist Output: Choose between strong and weak mist modes.
- Timer Settings: Select operating times of 1 hour, 3 hours, 6 hours, or continuous ON.
- 7-Color LED Light: Features an automatic color-cycling mode, fixed color option, and adjustable brightness.
- Auto Shut-Off: Automatically turns off when water runs out for safety and energy efficiency.
- Air Purification: Built-in minus ion generator helps purify the air.
5. Setup

Figure 5.1: Diffuser Setup Steps
A visual guide demonstrating the simple setup process. Step 1 shows inserting the power cable into the diffuser's base. Step 2 illustrates lifting the top cover to access the water tank for filling.
- Place the Diffuser: Position the diffuser on a flat, stable surface away from direct sunlight or heat sources.
- Connect Power: Insert the power adapter cable into the DC input port at the bottom of the diffuser. Plug the adapter into a standard wall outlet.
- Remove Cover: Gently lift the top cover of the diffuser to expose the water tank.
- Add Water: Using the provided measuring cup, fill the water tank with clean tap water up to the maximum water level line (550ml capacity). Do not overfill.
- Add Essential Oils (Optional): Add 3-5 drops of your preferred essential oil directly into the water tank. Adjust the amount based on your preference.
- Replace Cover: Carefully place the top cover back onto the diffuser, ensuring it is properly aligned and seated.
6. Operating Instructions

Figure 6.1: Diffuser with Remote Control
The Simpeak 550ml Essential Oil Diffuser, presented in a light brown wood grain finish, is shown with its accompanying remote control. Mist is visibly emanating from the top, indicating active operation.
The diffuser can be operated using the buttons on the unit or the included remote control.
6.1 Mist Control

Figure 6.2: Mist and Light Control Options
This graphic details the customizable light and mist settings. Users can choose from 7 automatic color cycles, select a fixed color, or turn off the light. Mist options include timer settings (1, 3, 6 hours, or continuous) and adjustable output intensity (strong or weak).
- Power On/Off: Press the "ON/OFF" button once to turn on the mist. Press again to turn off.
- Mist Mode (Continuous/Intermittent): Press the "Intermittent/Continuous" button to switch between continuous mist and intermittent mist modes.
- Mist Output (Strong/Weak): Press the "Big/Small" button to toggle between strong and weak mist output.
6.2 Timer Settings
- Set Timer: Press the "Timing" button repeatedly to cycle through the timer options: 1H (1 hour), 3H (3 hours), 6H (6 hours), or ON (continuous operation). The diffuser will automatically shut off when the selected time expires or when water runs out.
6.3 Light Control

Figure 6.3: 7 LED Color Options
The image showcases the diffuser's ability to display 7 different LED colors, creating a soothing ambiance. The light is designed to be soft and non-dazzling, suitable for various environments.
- Turn On Light: Press the "Light" button once to turn on the LED light. The color will automatically cycle through the 7 available colors.
- Fix Color: Press the "Light" button again to fix the current color.
- Change Color: Press the "Light" button repeatedly to cycle through the fixed colors.
- Turn Off Light: Press and hold the "Light" button for a few seconds to turn off the LED light.
7. Maintenance
Regular cleaning is essential to ensure optimal performance and longevity of your diffuser.
- Unplug: Always unplug the diffuser from the power outlet before cleaning.
- Empty Water: Remove the top cover and empty any remaining water from the tank.
- Clean Tank: Wipe the inside of the water tank with a soft cloth. For stubborn residue, use a cotton swab dipped in white vinegar to gently clean the ultrasonic plate at the bottom of the tank.
- Rinse: Rinse the tank with clean water, being careful not to get water into the air outlet.
- Dry: Allow all parts to air dry completely before reassembling or storing.
- Frequency: Clean the diffuser after every 5-6 uses or every 3-5 days, especially if using strong essential oils.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or low mist output | Lack of water; Water level too high; Ultrasonic plate dirty; Air outlet blocked. | Add water to the appropriate level; Clean the ultrasonic plate; Ensure air outlet is clear. |
| No power | Power adapter not connected; Outlet not working. | Check power connection; Try a different outlet. |
| Light not working | Light function off; Malfunction. | Press the "Light" button to turn on; If still not working, contact support. |
| Unusual noise | Water level too low; Unit not on a flat surface. | Add water; Place on a stable, flat surface. |
9. Specifications
| Brand | Simpeak |
| Model | LJ-D05015 |
| Color | Light Brown |
| Material | Acrylonitrile Butadiene Styrene (ABS) / Polypropylene (PP) |
| Product Dimensions | 16 x 8.38 x 8.5 cm (6.3 x 3.3 x 3.3 inches) |
| Item Weight | 530 grams |
| Water Capacity | 550 ml |
| Wattage | 12 watts |
| Ultrasonic Frequency | 2.4 MHz |
| Suitable Area | 20 - 40 m² |
| Remote Control Distance | ≤3 m |
| Auto Shut-off | Yes |
| Runtime | Up to 10 hours |
| Special Features | Timer setting, 7-color LED light, Remote control |
10. Warranty and Support
This product comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package for specific terms and conditions. For technical support, troubleshooting assistance, or warranty claims, please contact Simpeak customer service through the retailer where you purchased the product or visit the official Simpeak website for contact information.
We are committed to providing high-quality products and excellent customer service.