1. Safety Information
Please read and understand all safety warnings and instructions before operating this product. Failure to follow the warnings and instructions may result in electric shock, fire, and/or serious injury.
- Always wear appropriate personal protective equipment, including eye protection and hearing protection, during operation.
- Keep children and bystanders away while operating the leaf blower.
- Do not operate in wet conditions or near water.
- Ensure the battery is fully charged before first use.
- Never point the blower nozzle at people or animals.
2. Product Overview & Components
The Comchoi Electric Cordless Leaf Blower is designed for efficient outdoor cleaning. It features a powerful motor, multiple speed settings, and a versatile design for various tasks.
What's Included:
- 1 x Cordless Leaf Blower Unit
- 1 x Blowing Nozzle
- 1 x Extension Tube
- 1 x Charging Base
- 2 x 4.0Ah Lithium-Ion Batteries

The blower is equipped with a high-performance motor, delivering strong airflow for effective debris removal.

3. Setup & Assembly
3.1 Battery Installation
- Ensure the leaf blower is turned off.
- Align the battery pack with the battery slot on the bottom of the blower handle.
- Slide the battery into the slot until it clicks securely into place.
3.2 Nozzle and Extension Tube Assembly
- Align the extension tube with the blower's main outlet.
- Slide the extension tube onto the blower and rotate it clockwise until it locks securely.
- Attach the blowing nozzle to the end of the extension tube in the same manner, sliding and rotating to lock.

Video 3.1: Demonstration of the leaf blower's assembly and operation, highlighting its spinning feature.
4. Operating Instructions
4.1 Power On/Off
To turn the blower ON, press the power button. To turn it OFF, release the power button.
4.2 Speed Adjustment
The leaf blower features 5 adjustable speed settings, allowing you to customize airflow for different tasks. Use the speed dial located on the unit to select your desired power level, ranging from 120 MPH to 200 MPH.

4.3 180° Rotary Adjustment
The blower's handle features a 180° rotary adjustment, allowing you to switch between vertical and horizontal orientations. This ergonomic design reduces fatigue and provides flexibility for cleaning in various spaces, such as tight corners or elevated surfaces.

4.4 Usage Modes
The leaf blower can be used in two primary modes:
- Extension Tube Mode: Ideal for clearing large areas of fallen leaves, grass trimmings, or light snow from lawns, driveways, and patios.
- Handheld Mode (180° Rotation): Suitable for precision cleaning, such as clearing debris from car surfaces, window gaps, sawdust from workbenches, or fanning charcoal fires.

Video 4.1: Demonstration of the leaf blower's powerful wind output in action.
5. Battery Charging & Care
5.1 Charging the Batteries
- Insert the 21V-4.0Ah battery into the charging base.
- Connect the charging base to a power outlet.
- The indicator light on the charger will turn red, indicating charging is in progress.
- Once fully charged, the indicator light will turn green.
Each 4.0Ah battery provides approximately 10 minutes of continuous operation in high-speed mode and up to 150 minutes in low-speed mode.

5.2 Battery Safety & Protection
The batteries are designed with multiple safety features:
- Overheat Protection
- Overcharge Protection
- Short-Circuit Protection

6. Maintenance
6.1 Cleaning
- Always disconnect the battery before cleaning.
- Wipe the exterior of the blower with a clean, damp cloth.
- Remove any debris from the air intake vents and nozzle to ensure optimal performance.
6.2 Storage
- Store the leaf blower and batteries in a cool, dry place, away from direct sunlight and moisture.
- Ensure batteries are partially charged (not fully depleted or fully charged) before long-term storage.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Blower does not start | Battery not installed correctly or depleted. | Ensure battery is securely clicked into place. Charge the battery if depleted. |
| Reduced airflow/power | Air intake or nozzle blocked by debris. Battery charge is low. | Clear any obstructions from the air intake and nozzle. Recharge the battery. |
| Blower stops unexpectedly | Battery overheated or depleted. | Allow the battery to cool down. Recharge the battery. |
8. Specifications
- Brand: Comchoi
- Model Name: 250911-001
- Power Source: Battery Powered
- Motor: 900,000 RPM Axial Flow Turbofan
- Max Air Speed: Up to 200 MPH
- Max Air Volume: Up to 700 CFM
- Batteries: 2 x 21V-4.0Ah Lithium-Ion (included)
- Item Weight: Approximately 3.6 lbs (blower unit only), 6.56 lbs (with batteries)
- Special Features: Adjustable Speed, Adjustable Tube Length, Battery Charge Indicator, Overload Protection, Rechargeable, 180° Rotary Adjustment
9. Warranty & Support
For warranty information or technical support, please refer to the product packaging or contact Comchoi customer service directly. Keep your purchase receipt for warranty claims.