1. Introduction
The Okaysou AirMic4S Air Purifier is designed to provide clean and fresh air in your home or office. It features an advanced filtration system to capture and reduce airborne particles, odors, and harmful gases, contributing to a healthier indoor environment.

Figure 1.1: Okaysou AirMic4S Air Purifier, illustrating its capability to filter various airborne contaminants including dust, pollen, dander, smoke, and VOCs.
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your AirMic4S Air Purifier. Please read it thoroughly before use and keep it for future reference.
2. Safety Information
To reduce the risk of fire, electric shock, or injury, please observe the following safety precautions:
- Always unplug the air purifier before moving, cleaning, or replacing filters.
- Do not operate the unit with a damaged cord or plug.
- Keep the power cord away from heated surfaces.
- Do not block air openings or place the unit on a soft surface where openings may be blocked.
- Do not immerse the unit in water or other liquids.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Use only genuine Okaysou replacement filters to maintain optimal performance and warranty.
3. Product Overview
The Okaysou AirMic4S features a compact design with powerful air purification capabilities. It utilizes a multi-stage filtration system to effectively clean the air.

Figure 3.1: Front view of the Okaysou AirMic4S Air Purifier, showcasing its sleek design.
3.1 Key Components
- Air Inlet Grille: Located on the lower section, designed to capture hair and large particles.
- Control Panel: Top-mounted touch panel for all functions.
- Air Outlet: Top grille for purified air release.
- Filter Compartment: Houses the multi-stage filter.
3.2 Filtration System
The AirMic4S employs an advanced 3-stage H13 True HEPA filtration system:
- Washable Pre-filter: The first defense, capturing large particles like hair and fur.
- H13 True HEPA Filter: Captures pollen, dander, dust, smell, and smoke particles as small as 0.3 microns.
- Active Carbon Filter: Effectively absorbs stubborn and unwanted odors, harmful gases, and VOCs.

Figure 3.2: Illustration of the advanced 3-stage H13 True HEPA filtration system, detailing the washable pre-filter, H13 True HEPA filter, and active carbon filter.
4. Setup
Follow these steps to set up your Okaysou AirMic4S Air Purifier:
- Unpack the Unit: Carefully remove the air purifier from its packaging.
- Remove Filter Packaging: Before first use, unscrew the bottom cover (twist counter-clockwise) and remove the plastic packaging from the filter.
- Reinstall Filter: Place the filter back into the unit, ensuring it is seated correctly.
- Secure Bottom Cover: Replace the bottom cover and twist clockwise to secure it.
- Placement: Place the air purifier on a firm, level surface. Ensure there is adequate space around the unit for proper airflow (at least 6 inches from walls or furniture).
- Plug In: Connect the power cord to a suitable electrical outlet.
5. Operating Instructions
The AirMic4S features an intuitive touch control panel for easy operation.

Figure 5.1: The control panel of the AirMic4S, showing buttons for power, fan speed, timer, filter reset, and night light/sleep mode.
5.1 Control Panel Functions
- Power Button (⑁): Press to turn the unit ON or OFF.
- Fan Speed Button (✴): Cycles through fan speeds (Low, Medium, High).
- Timer Button (⌛): Sets the operating timer for 2, 4, or 8 hours. The unit will automatically turn off after the selected time.
- Night Light Mode (🌙): Activates or deactivates the night light feature.
- Sleep Mode (🌛): Activates a quiet operation mode (as low as 24dB) for undisturbed sleep.
- Filter Reset Indicator (📄): Lights up when it's time to replace the filter. Press and hold to reset after filter replacement.
5.2 General Operation
- Power On: Press the Power button to start the air purifier. It will typically start on a low fan speed.
- Adjust Fan Speed: Press the Fan Speed button repeatedly to cycle through the desired fan speeds (Low, Medium, High).
- Set Timer: Press the Timer button to select 2H, 4H, or 8H. The corresponding indicator will light up.
- Activate Sleep Mode: Press the Sleep Mode button to enter ultra-quiet operation. The night light may dim or turn off in this mode.
- Control Night Light: Use the Night Light button to toggle the light on or off independently.
- Power Off: Press the Power button again to turn off the unit.
6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your air purifier.
6.1 Filter Replacement
The filter replacement indicator will illuminate when it's time to change the filter. Filter lifespan varies based on usage and air quality.
- Unplug the air purifier from the power outlet.
- Turn the unit upside down and twist the bottom cover counter-clockwise to remove it.
- Remove the old filter.
- Insert a new genuine Okaysou filter into the unit.
- Replace the bottom cover and twist clockwise to secure it.
- Plug in the unit. With the unit powered on, press and hold the Filter Reset button for 3-5 seconds until the indicator light turns off.
Okaysou offers 4 optional replacement filters tailored to specific needs:
- Original Filter: Best for general use, absorbing odors, dander, pollen, smoke.
- Customized Blue Filter (G-Defense Filter): Best for humid environments to absorb harmful substances.
- Customized Green Filter (Toxin Absorber Filter): Best for areas with high levels of toxins, vehicle exhaust, VOCs.
- Yellow Odor Remover Filter: Best for powerfully reducing odors from ash, wildfire, cooking.

Figure 6.1: Various optional replacement filters available for the AirMic4S, each designed for specific air purification needs.
6.2 Cleaning the Unit
- Wipe the exterior of the air purifier with a soft, dry cloth.
- The washable pre-filter can be gently cleaned with a soft brush or vacuum cleaner to remove large dust and hair particles. Ensure it is completely dry before reinstallation.
- Do not use abrasive cleaners or solvents.
7. Troubleshooting
If you encounter issues with your AirMic4S Air Purifier, refer to the following table for common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on. | Not plugged in; power outage; filter not installed correctly. | Ensure unit is securely plugged in. Check power supply. Verify filter is unwrapped and correctly seated, and bottom cover is secured. |
| Airflow is weak or noisy. | Filter is dirty or clogged; air inlets/outlets blocked. | Clean or replace the filter. Ensure nothing is obstructing the air inlets or outlets. |
| Odor persists. | Filter needs replacement; strong external odor source. | Replace the filter, especially if using the Original filter for strong odors. Consider using an Odor Remover filter. Ensure the room is adequately ventilated. |
| Filter Reset light remains on after replacement. | Filter reset not performed correctly. | With the unit powered on, press and hold the Filter Reset button for 3-5 seconds until the light turns off. |
If the problem persists after trying these solutions, please contact Okaysou customer support.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | AirMic 4S |
| Product Dimensions | 8.7"D x 8.7"W x 11.89"H |
| Weight | 6.6 Pounds |
| Rated Power | 25 watts |
| Noise Level | 24 dB (Sleep Mode) |
| Coverage Area | Up to 300 sq. ft. (5x per hour in 150 sq.ft, 3x per hour in 300 sq.ft, 2x per hour in 580 sq.ft) |
| Filtration Type | H13 True HEPA (3-Stage) |
| Ozone Free | 100% Ozone Free |
| Certifications | CARB, CE, RoHS, ETL Listed |

Figure 8.1: Dimensional view of the Okaysou AirMic4S Air Purifier, showing its height, depth, and width.
9. Warranty and Support
The Okaysou AirMic4S Air Purifier comes with a 5-year warranty. Okaysou also provides lifetime US-based customer support.
For warranty claims, technical assistance, or any questions regarding your product, please contact Okaysou customer support through their official channels or refer to the contact information provided with your purchase.
You can also visit the official Okaysou store on Amazon for more information and support: Okaysou Amazon Store