Introduction
Thank you for choosing the KEMEI 1787 Cordless Hair and Beard Trimmer. This manual provides essential information for the safe and effective use, maintenance, and care of your new trimmer. Please read these instructions thoroughly before first use and retain them for future reference.
Product Overview and Package Contents
The KEMEI 1787 is a professional-grade cordless hair and beard trimmer designed for precision grooming. It features a powerful motor, long-lasting battery, and an informative LED display.

Image: The KEMEI 1787 trimmer displayed with its included accessories: guide combs, charging cable, oil, and cleaning brush.
Package Contents:
- 1 x KEMEI 1787 Hair and Beard Trimmer with LCD Digital Display
- 3 x Limited Clipper Guide Combs (1mm, 2mm, 3mm)
- 1 x Type-C USB Charging Cable
- 1 x Lubricant Oil
- 1 x Cleaning Brush
- 1 x Protective Blade Cover
Key Features
- Professional Blades: Equipped with upgraded ceramic and powder metallurgic blades for precise and snag-free trimming.
- High-Speed Motor: Features a powerful 9000 RPM motor with two adjustable speeds (8000-9000 RPM) for efficient cutting.
- LED Digital Display: Clearly shows remaining power, current running status, and motor speed.
- Long-Lasting Battery: Integrated 2000 mAh rechargeable battery provides up to 240 minutes of cordless operation on a 2.5-hour charge.
- USB Charging: Convenient Type-C charging allows for flexible power options, including plug-and-play functionality.
- Ergonomic Design: Full metal body provides a comfortable grip and a sleek, professional appearance.

Image: An illustration highlighting the powerful 9000 RPM motor inside the KEMEI 1787 trimmer.

Image: Close-up of the KEMEI 1787 trimmer's LED display, indicating battery level, running status, and motor speed.

Image: Diagram illustrating the USB Type-C charging capability of the KEMEI 1787 trimmer, showing compatibility with various USB power sources.
Safety Instructions
To ensure safe operation and prevent injury or damage, please adhere to the following safety guidelines:
- Avoid direct contact of the trimmer blades with eyes and sensitive skin areas.
- Do not immerse the trimmer in water or use it near bathtubs, showers, basins, or other vessels containing water.
- Always follow proper cleaning and maintenance procedures as outlined in this manual.
- Keep the trimmer and all accessories out of reach of children.
- Do not attempt to disassemble or repair the trimmer yourself. Contact qualified service personnel for assistance.
- Ensure the charging cable is not damaged before use.
- Unplug the trimmer from the power source before cleaning.
Setup
Initial Charging:
- Before first use, fully charge the trimmer for approximately 2.5 hours.
- Connect the Type-C USB charging cable to the trimmer's charging port.
- Plug the other end of the USB cable into a compatible USB power source (e.g., computer, power bank, USB wall adapter).
- The LED display will indicate the charging status and battery level.
- Once fully charged, the trimmer provides up to 240 minutes of cordless operation.
Attaching Guide Combs:

Image: The KEMEI 1787 trimmer shown with its three included guide combs (1mm, 2mm, 3mm) and a protective cover.
- Ensure the trimmer is turned off.
- Select the desired guide comb (1mm, 2mm, or 3mm) for your preferred hair length.
- Align the comb with the trimmer blade and push it firmly until it clicks into place.
- To remove, gently pull the comb away from the blade.
Operating Instructions
Powering On/Off:
- Press the power button once to turn the trimmer on. The LED display will illuminate.
- Press the power button again to cycle through the two available motor speeds (8000 RPM and 9000 RPM).
- Press and hold the power button for a few seconds to turn the trimmer off.
Trimming Hair and Beard:
- Ensure your hair or beard is clean and dry.
- Attach the appropriate guide comb for the desired length. For precise edging or zero-gapping, use without a comb.
- Hold the trimmer with the blade flat against the skin or at a slight angle, moving against the direction of hair growth.
- Use slow, controlled strokes for an even trim.
- Regularly clear accumulated hair from the blade during use to maintain optimal performance.

Image: The KEMEI 1787 trimmer being used for various grooming tasks, including hair trimming, beard trimming, and hair art.
Maintenance and Cleaning
Proper maintenance ensures the longevity and performance of your KEMEI 1787 trimmer.
- After Each Use:
- Turn off and unplug the trimmer.
- Remove any attached guide comb.
- Use the provided cleaning brush to remove loose hairs from the blades and the trimmer body.
- Apply a few drops of the included lubricant oil to the blades. Turn the trimmer on for a few seconds to distribute the oil, then turn it off.
- Replace the protective blade cover.
- Storage: Store the trimmer in a cool, dry place, away from direct sunlight and moisture.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Trimmer does not turn on. | Battery is depleted. | Charge the trimmer for 2.5 hours. |
| Reduced cutting performance. | Blades are dirty or not lubricated. | Clean the blades with the brush and apply lubricant oil. |
| Trimmer pulls hair. | Blades are dull or hair is too long/thick for current speed. | Ensure blades are clean and oiled. Try a higher motor speed. Consider pre-trimming very long hair. |
| LED display not working. | Trimmer is off or battery is very low. | Turn on the trimmer or charge the battery. |
Specifications
| Feature | Detail |
|---|---|
| Model | KM-1787 |
| Brand | KEMEI |
| Motor Speed | Up to 9000 RPM (adjustable 8000-9000 RPM) |
| Battery Type | 2000 mAh Rechargeable Lithium-ion |
| Charging Time | Approx. 2.5 hours |
| Operating Time | Up to 240 minutes (cordless) |
| Blade Material | Carbon Steel, DLC Coated T-Blade |
| Power Source | Battery Powered (USB Type-C Charging) |
| Weight | 516 Grams (1.14 Pounds) |
| Dimensions | 7.8 x 3.54 x 2.64 inches |
Warranty and Support
KEMEI products are manufactured with quality and reliability in mind. For any questions, concerns, or warranty inquiries regarding your KEMEI 1787 trimmer, please contact KEMEI customer support through the retailer where the product was purchased or visit the official KEMEI website for assistance.
Please retain your proof of purchase for warranty claims.