1. Introduction
The Cornesty 3-in-1 Cordless Handheld Vacuum Cleaner (Model YT-01) is a versatile cleaning device designed for various applications in your car, home, and office. This multi-functional tool combines vacuuming, blowing, and air compression capabilities into a compact and portable unit. Equipped with a powerful 19000Pa brushless motor and a rechargeable battery, it offers efficient cleaning and convenience.

Figure 1: Overview of the Cornesty 3-in-1 Cordless Handheld Vacuum Cleaner and its key features.
2. Product Components
The package includes the following components:
- Main Body: The core unit housing the motor, battery, and controls.
- Dust Collection Cup: Transparent, removable cup for collecting debris.
- HEPA Filter: Washable, 4-layer filtration system.
- Long Nozzle: For reaching tight spaces and corners.
- Wide Nozzle: For broader surface cleaning.
- Brush Nozzle: For agitating and collecting stubborn dirt or pet hair.
- Flat Suction Nozzle: For general vacuuming.
- Inflation Nozzles (2 types): For inflating various items.
- Air Compression Nozzle: For vacuum sealing bags.
- USB Type-C Charging Cable: For recharging the device.
- User Manual: This instruction guide.

Figure 2: All components included with the Cornesty 3-in-1 Cordless Handheld Vacuum Cleaner.
3. Setup
3.1 Charging the Device
Before first use, ensure the device is fully charged. The charging time is approximately 2 hours.
- Turn off the machine power before charging.
- Connect the USB Type-C charging cable to the charging port located at the bottom of the main body.
- Connect the other end of the USB cable to a compatible 5V/2A USB power adapter (not included).
- The charging indicator light will illuminate during charging and turn off when fully charged.

Figure 3: The USB Type-C charging port is located at the base of the handle.
3.2 Assembling Accessories
Select the appropriate nozzle or brush for your cleaning task. Attach the desired accessory firmly to either the suction port (front) for vacuuming or the blowing port (rear) for air dusting/inflation. Ensure a secure fit to prevent air leakage and maintain optimal performance.
4. Operating Instructions
4.1 Power On/Off and Speed Adjustment
- To turn on the device, press and hold the power button for 3 seconds.
- The device has 3 speed gears. Press the power button once to switch to the 2nd gear, and twice to switch to the 3rd gear.
- To turn off the device, press the power button again from the 3rd gear.
4.2 Using as a Vacuum Cleaner
Attach the chosen suction nozzle to the front port of the device. The 19000Pa suction power is effective for lifting surface-level dirt, dust, and embedded debris from various surfaces.
- Flat Suction Nozzle: Ideal for general vacuuming of flat surfaces.
- Long Nozzle: Use for narrow gaps, car seats, and hard-to-reach areas.
- Brush Nozzle: Effective for cleaning carpets, upholstery, and removing pet hair.

Figure 4: The vacuum cleaner is suitable for cleaning car interiors and other tight spaces.
4.3 Using as an Air Duster/Blower
Attach the appropriate nozzle to the rear port of the device for blowing functions. This feature is useful for:
- Blowing dust from keyboards, electronics, and delicate surfaces.
- Inflating small items like swimming rings or air pillows using the inflation nozzles.
- Compressing air from storage bags using the air compression nozzle.

Figure 5: The device can be used for inflation and air compression tasks.
5. Maintenance
5.1 Disassembly and Cleaning
Regular cleaning ensures optimal performance and extends the lifespan of your vacuum cleaner.
- To remove the dust collection cup, twist it counter-clockwise from the main body.
- Empty the collected dust and debris into a trash receptacle.
- Remove the HEPA filter from the dust cup.
- Wash the dust cup and HEPA filter with clean water. Ensure they are completely dry before reassembling.
- Reinstall the dry HEPA filter into the dust cup, then rotate the dust cup clockwise onto the main body until it clicks securely into place.
Warm Tip: Wash the filter after each use and reuse it only after it is completely dry to maintain filtration efficiency.
6. Troubleshooting
If you encounter any issues with your device, refer to the following common troubleshooting steps:
- Device not turning on: Ensure the battery is sufficiently charged. Check the charging cable and adapter.
- Low suction power: Check if the dust cup is full and empty it. Clean or replace the HEPA filter if it's clogged. Ensure all attachments are securely fitted.
- Motor appears fast and slow, or device stops: This indicates low battery. Recharge the device.
- Unusual noise: Check for any obstructions in the suction or blowing ports. Ensure the dust cup and filter are correctly installed.
If the problem persists after attempting these steps, please contact customer support.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | Cornesty |
| Model Name | YT-01 |
| Special Features | Compact, Cordless, HEPA, Portable, Washable Filter |
| Filter Type | HEPA Filter (4-layer filtration) |
| Power Source | Battery Powered (Lithium-Ion) |
| Wattage | 180 watts |
| Maximum Suction | 19000 Picometer (Pa) |
| Battery Capacity | 2000mAh |
| Charging Time | 2 Hours |
| Battery Life | Up to 20 minutes |
| Noise Level | 50 Decibels |
| Dust Cup Capacity | 13.52 Fluid Ounces |
| Product Dimensions | 3.94"L x 3.15"W x 7.48"H |
| Item Weight | 1.1 pounds |
| Connectivity Technology | USB Type-C |
| Control Method | Push Button / Touch |

Figure 6: Dimensions of the main unit and various accessories.
8. Safety Information
- Ensure sufficient power before using to avoid motor strain.
- Do not use this product at high temperatures or in environments below -20°C or above 50°C.
- Do not let children play with this product.
- Do not absorb any corrosive liquids or flammable materials.
- Do not operate the air duster while the battery needs recharging.
- Avoid excessive heat and damage to the unit or battery.
9. Warranty and Support
For warranty information or customer support, please refer to the contact details provided in your product packaging or on the official Cornesty website. If you have any questions, you may also contact the seller directly through your purchase platform.
Note: Some customer reviews mention a 1-year warranty, however, specific warranty terms should be confirmed with the manufacturer or seller.