Introduction
This manual provides essential instructions for the safe and efficient use of your ONSEEN Cordless Vacuum Cleaner Model M81. Please read this manual thoroughly before operating the appliance and retain it for future reference.
Important Safety Instructions
When using electrical appliances, basic precautions should always be followed, including the following:
- Read all instructions before using this appliance.
- Do not use outdoors or on wet surfaces.
- Do not allow to be used as a toy. Close attention is necessary when used by or near children.
- Use only as described in this manual. Use only manufacturer’s recommended attachments.
- Do not use with damaged cord or plug. If appliance is not working as it should, has been dropped, damaged, left outdoors, or dropped into water, return it to a service center.
- Do not pull or carry by cord, use cord as a handle, close a door on cord, or pull cord around sharp edges or corners. Do not run appliance over cord. Keep cord away from heated surfaces.
- Do not unplug by pulling on cord. To unplug, grasp the plug, not the cord.
- Do not handle plug or appliance with wet hands.
- Do not put any object into openings. Do not use with any opening blocked; keep free of dust, lint, hair, and anything that may reduce air flow.
- Keep hair, loose clothing, fingers, and all parts of body away from openings and moving parts.
- Turn off all controls before unplugging.
- Use extra care when cleaning on stairs.
- Do not use to pick up flammable or combustible liquids, such as gasoline, or use in areas where they may be present.
- Do not pick up anything that is burning or smoking, such as cigarettes, matches, or hot ashes.
- Do not use without dust cup and/or filters in place.
- Prevent unintentional starting. Ensure the switch is in the off-position before connecting to battery pack, picking up or carrying the appliance.
- Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.
- Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
Package Contents
Carefully unpack your ONSEEN Cordless Vacuum Cleaner and ensure all components are present and in good condition. The package should include:
- Main Motor Unit (Handheld Vacuum)
- Extension Wand
- Motorized Floor Brush with Green LED Lights
- Crevice Tool
- 2-in-1 Brush Tool
- Wall Mount Bracket
- Charging Adapter
- Cleaning Brush Tool
- Spare HEPA Filters (2 included)
- User Manual

Image: All components of the ONSEEN Cordless Vacuum Cleaner M81, including the main unit, extension wand, floor brush, various attachments, wall mount, and spare filters.
Setup and Assembly
- Charging the Battery: Before first use, fully charge the vacuum cleaner. Connect the charging adapter to the main motor unit and plug it into a power outlet. The OLED display will indicate charging status.
- Assembling the Vacuum:
- Insert the extension wand into the main motor unit until it clicks securely.
- Attach the motorized floor brush to the other end of the extension wand until it clicks.
- Alternatively, attach accessories like the crevice tool or 2-in-1 brush directly to the main motor unit for handheld use.
- Wall Mount Installation (Optional): Choose a suitable location near a power outlet. Secure the wall mount bracket to the wall using the provided screws and anchors. This allows for convenient storage and charging.

Image: A collage demonstrating various setup and maintenance actions, including charging the vacuum on its wall mount, emptying the dust cup, and cleaning washable components.
Operating Instructions
- Power On/Off: Press the power button on the main motor unit to turn the vacuum on or off.
- Understanding the OLED Display: The intelligent OLED panel provides real-time information:
- Battery Level: Shows the remaining battery percentage.
- Suction Mode: Indicates the current cleaning mode (Eco, Standard, Boost, Extreme).
- Blockage Alert: A red alarm will display if the roller brush or main unit is blocked.
- Garbage Progress Bar: Visually indicates dust accumulation.
- Adjusting Suction Modes: Use the "+/-" button on the OLED panel to cycle through the four available suction modes:
- Eco Mode: Up to 65 minutes runtime, suitable for light cleaning.
- Standard Mode: Balanced power for everyday cleaning.
- Boost Mode: Increased suction for moderate dirt.
- Extreme Mode (45Kpa): Maximum suction for stubborn dirt and deep cleaning, approximately 15 minutes runtime.
- Green LED Dust Detection: The motorized floor brush features green LED lights that illuminate dust particles on the floor, making them more visible for thorough cleaning.
- Self-Standing Feature: The vacuum is designed to stand upright on its own, providing convenient temporary storage during cleaning breaks. To engage, ensure the floor brush is flat on the ground and the main unit is balanced.
- Using Attachments: Select the appropriate attachment for the cleaning task. The crevice tool is ideal for narrow spaces, while the 2-in-1 brush is suitable for upholstery and delicate surfaces.

Image: A close-up of the intelligent OLED touch display, illustrating the remaining battery reminder, three suction modes, and dust auto-sensing features.

Image: The motorized floor brush with its green LED lights activated, highlighting dust particles on a dark floor for improved visibility during cleaning.

Image: The ONSEEN Cordless Vacuum Cleaner standing upright independently, demonstrating its self-standing design for convenient temporary storage.
Maintenance and Cleaning
Regular maintenance ensures optimal performance and extends the lifespan of your vacuum cleaner.
- Emptying the Dust Cup: The vacuum features a 2L dual-cup design. When the dust cup is full, press the release button to open the bottom flap and empty contents into a waste bin.
- Cleaning Filters:
- The multi-conical hole cyclone filtration system and HEPA filters should be cleaned regularly.
- Twist and pull to remove the dust cup and filter assembly from the main unit.
- Separate the HEPA filter and cyclone components. Tap off loose dirt.
- Rinse the HEPA filter and cyclone components under running water. Ensure they are completely dry before reassembling and placing back into the vacuum. Do not use the vacuum with wet filters.
- Cleaning the Roller Brush: The anti-tangle design helps reduce hair wrap, but periodic cleaning is recommended. Unlock the brush roll cover on the motorized floor brush and remove the roller. Use the cleaning brush tool to remove any tangled hair or debris. Reinsert the roller and secure the cover.
- Washing Components: The dust cup and certain filter components are washable. Refer to the image below for guidance on washable parts. Always ensure all parts are completely dry before reassembly.

Image: A visual representation of the dual-cup separation technology, showing how different types of debris are collected in separate compartments within the dust cup.
Troubleshooting
If you encounter issues with your vacuum cleaner, refer to the following table for common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Vacuum does not turn on. | Battery is depleted. | Charge the battery fully. |
| Reduced suction power. | Dust cup is full. | Empty the dust cup. |
| Reduced suction power. | Filters are clogged. | Clean or replace the filters. Ensure they are completely dry before reinstallation. |
| Reduced suction power. | Hose or brush roll is blocked. | Check for and remove any blockages in the extension wand, floor brush, or main unit. The OLED display may show a blockage alert. |
| Roller brush not spinning. | Hair or debris tangled in brush. | Remove and clean the roller brush. |
| Short runtime. | Using high suction mode. | Switch to Eco or Standard mode for longer runtime. Ensure battery is fully charged. |
Specifications
| Feature | Detail |
|---|---|
| Brand | ONSEEN |
| Model Number | M81 |
| Power/Wattage | 580W (Motor), 500W (Overall) |
| Suction Power | Up to 45Kpa (Extreme Mode) |
| Voltage | 25.9 Volts |
| Dust Cup Capacity | 2 Liters (Dual-cup design) |
| Runtime | Up to 65 minutes (Eco Mode), 15 minutes (Extreme Mode) |
| Number of Speeds | 4 (Eco, Standard, Boost, Extreme) |
| Filter Type | HEPA Filter (Lv9 High Efficiency Filtration) |
| Special Features | Cordless, OLED Smart Panel, Self-Standing, Green LED Dust Detection, Anti-Tangle Brush |
| Product Dimensions | 22.86 x 11.18 x 111.76 cm |
| Item Weight | 4.07 kg |

Image: The ONSEEN Cordless Vacuum Cleaner in action, illustrating its 580W motor and 45Kpa suction power, effectively cleaning various debris from a carpet.

Image: An illustration of the vacuum's battery pack, highlighting its 7*2500mAh capacity and the capability to provide up to 65 minutes of runtime in Eco Mode.
Warranty and Support
Your ONSEEN Cordless Vacuum Cleaner Model M81 is covered by a manufacturer's warranty. For specific warranty terms, conditions, and duration, please refer to the warranty card included in your product packaging or contact ONSEEN customer support. For technical assistance or service inquiries, please visit the official ONSEEN website or contact their customer service department.