Introduction
Welcome to your new BarberBoss QR-2090 Professional Facial Groomer and Hair Clipper. This manual provides essential information for the safe and effective use of your device. Please read all instructions carefully before operating the trimmer and retain this manual for future reference.
Important Safety Information
To reduce the risk of electric shock, injury, or fire, always follow these basic safety precautions:
- Read all instructions thoroughly before using the appliance.
- Keep the appliance dry. Do not immerse the trimmer in water or use it in the shower.
- Do not use the appliance if the trimmer itself or the USB charging cable appears damaged.
- 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.
- Children should be supervised to ensure that they do not play with the appliance.
- Use only the provided USB cable for charging. Ensure the power source is a standard 5V USB output.
- Avoid using high-wattage mobile phone chargers, as they may not be compatible and could affect battery life or charging performance.
- Unplug the trimmer from the power source after charging and before cleaning.
Package Contents
Please check the box for the following items:
- 1 x BarberBoss QR-2090 Rechargeable Cordless Hair Clipper
- 1 x USB Charging Cable
- 3 x Guide Combs (for 0.5mm, 1mm, and 2mm cutting lengths)
- 1 x Cleaning Brush
- 1 x Protective Blade Cover
- 1 x Lubricating Oil Bottle
Product Overview
The BarberBoss QR-2090 features a durable stainless steel T-blade designed for precise trimming of hair and beards. Its compact and ergonomic design ensures comfortable handling and ease of use.

Charging the Device
The trimmer is equipped with a powerful rechargeable battery. For optimal performance, fully charge the trimmer before its first use.
- Connect the provided USB cable to the charging port on the trimmer.
- Plug the other end of the USB cable into a compatible 5V USB power source, such as a laptop, power bank, car socket, or a 5V/1A USB wall adapter (not included).
- During charging, a red light will flash on the trimmer.
- When the battery is fully charged, a green light will flash.
- A full charge typically takes approximately 1.5 hours and provides about 70-80 minutes of cordless runtime.
- If the battery level is low during operation, a red light will illuminate, indicating that the device needs to be recharged soon.
Setup
Attaching Guide Combs
To achieve different hair lengths, select one of the three guide combs provided (0.5mm, 1mm, or 2mm).
- Ensure the trimmer is turned off before attaching or removing guide combs.
- Align the chosen guide comb with the trimmer blade.
- Gently push the comb onto the blade until it securely clicks into place.
- To remove a guide comb, gently pull it away from the blade.

Operating Instructions
General Trimming
Follow these steps for effective and comfortable trimming:
- Ensure the trimmer's battery is sufficiently charged.
- Attach the desired guide comb for your preferred hair length (0.5mm, 1mm, or 2mm). For the shortest cut (0.5mm), use the trimmer without any guide comb attached.
- Press the power button to turn on the trimmer.
- Hold the trimmer at a comfortable angle and move it gently against the direction of hair growth for an even and consistent cut.
- The self-sharpening stainless steel T-blades are designed to provide a clean, smooth cut without pulling hair.
- After use, turn off the trimmer.

Maintenance
Cleaning the Blades
Regular cleaning ensures optimal performance and hygiene of your trimmer.
- After each use, turn off the trimmer and unplug it if it was charging.
- Remove any attached guide comb.
- Rinse the blade head under running tap water. The trimmer is designed to be splash-proof for easy cleaning.
- Use the provided cleaning brush to remove any trapped hairs or debris from the blade area.
- Allow the blade to air dry completely before reattaching the protective cover or storing the device.
Lubrication
To maintain blade sharpness and ensure smooth operation, apply a few drops of the included lubricating oil to the blades after every few uses, or as needed. Turn the trimmer on for a few seconds to distribute the oil.

Troubleshooting
Device Not Turning On / Not Charging
- Ensure the USB cable is securely connected to both the trimmer and the power source.
- Verify that the USB power source is active and providing power (e.g., try a different USB port or wall adapter).
- Check the charging indicator lights: A flashing red light indicates charging, and a flashing green light indicates a full charge. If no light appears, the cable or power source might be faulty.
- Avoid using high-wattage phone chargers, as they may not be compatible with the trimmer's charging requirements. Use a standard 5V/1A USB charger.
Poor Trimming Performance
- Ensure the battery is sufficiently charged. A low battery can reduce motor speed and cutting efficiency.
- Clean the blades thoroughly to remove any accumulated hair or debris that might be hindering performance.
- Apply lubricating oil to the blades if they feel stiff or if the trimmer is pulling hair.
- Ensure the guide comb is correctly and securely attached.
Specifications
| Brand: | BARBERBOSS |
| Model: | QR-2090 |
| Blade Material: | Stainless Steel |
| Power Source: | Rechargeable Battery (USB Charging) |
| Runtime: | Approximately 70-80 minutes |
| Charging Time: | Approximately 1.5 hours |
| Included Components: | Trimmer, USB Cable, 3 Guide Combs, Cleaning Brush, Protective Blade Cover, Lubricating Oil Bottle |
Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact details provided with your original purchase documentation or visit the official BARBERBOSS website. Please have your model number (QR-2090) and purchase date ready when contacting support.