Introduction
This manual provides instructions for the safe and effective use of your Mueller UltraOneBlade Trimmer. Please read all instructions carefully before first use and retain this manual for future reference. The UltraOneBlade Trimmer is designed for men's beard and mustache grooming, offering cordless, waterproof operation with adjustable hair length settings and a battery indicator.
Safety Information
To ensure safe operation and prevent injury or damage, observe the following safety guidelines:
- Avoid contact with eyes, skin, and water.
- Always unplug the trimmer before cleaning.
- Follow recommended cleaning and maintenance procedures.
- Do not submerge the trimmer in water.
- Keep out of reach of children.
- Do not use if the trimmer or charging cord is damaged.
Product Features
The Mueller UltraOneBlade Trimmer incorporates several features for an efficient grooming experience:

Image: The Mueller UltraOneBlade Trimmer, showcasing its ergonomic design and adjustable length dial.
- Adjustable Hair Length Dial: Select desired hair length from 1mm (0.04") to 10mm (0.4") by turning the dial.
- Multipurpose Design: Functions as both a hair and beard trimmer.
- Protective Cap: Included for blade protection when not in use.
- Travel Lock: Prevents accidental activation during storage or travel.
- Quiet and Powerful Motor: Designed to cut through thick hair without snagging or pulling.
- Cordless Operation: Utilizes a Lithium-Ion Battery with Turbo Charge Technology.
- Fast Charging: One full charge takes approximately 1 hour.
- LED Display: Clearly shows the remaining battery percentage.
- Ergonomical Handle: Designed for comfortable grip and ease of use.
- Waterproof: Suitable for wet or dry shaving and easy cleaning under tap water.
- Long-lasting Titanium Bi-directional blade: Durable blade for effective trimming.

Image: The long-lasting titanium bi-directional blade of the UltraOneBlade Trimmer.

Image: The water-resistant design of the trimmer, ensuring safety and durability.

Image: The trimmer is an ideal travel companion, featuring dual voltage, travel lock, and low noise operation.
Setup
- Initial Charge: Before first use, fully charge the trimmer for approximately 1 hour. The LED display will indicate battery percentage.
- Unlocking for Use: If the travel lock is engaged, disengage it to allow the trimmer to power on.
Operating Instructions
Follow these steps for effective trimming:
- Select Hair Length: Turn the length setting dial to choose your desired hair length. Settings range from 1mm (0.04") to 10mm (0.4"). The dial indicates the remaining hair length after trimming.
- Power On: Press the power button to start the trimmer.
- Trimming: Guide the trimmer against the direction of hair growth for an even trim. The trimmer can be used for both dry and wet shaving.
- Protective Cap: Attach the protective cap over the blade when the trimmer is not in use to prevent damage.
- Travel Lock: Engage the travel lock when storing or traveling to prevent accidental activation.

Image: Precision trimming with the adjustable length dial, allowing hair length selection from 1mm to 10mm.

Image: The trimmer can be used for dry shaving or wet shaving with foam, even in the shower.
Maintenance and Cleaning
Regular cleaning and maintenance will prolong the life of your trimmer:
- Cleaning: After each use, ensure the trimmer is switched off and unplugged. Rinse the trimmer head under running tap water to remove hair clippings. Avoid submerging the entire unit in water.
- Drying: Allow the trimmer to air dry completely before storing or recharging.
- Storage: Store the trimmer with the protective cap attached in a dry place. Engage the travel lock if storing for an extended period.

Image: The trimmer is easy to clean by rinsing under tap water.
Troubleshooting
If you encounter issues with your trimmer, consider the following:
- Trimmer not turning on: Ensure the battery is charged. Check if the travel lock is engaged and disengage it if necessary.
- Poor trimming performance: Ensure the blade is clean and free of hair buildup. The battery might be low; recharge the trimmer.
- Battery not charging: Verify the charging cable is properly connected to both the trimmer and a power source. Ensure the power source is active.
For issues not resolved by these steps, please refer to the warranty information.
Specifications
| Model Name: | UltraOneBlade Trimmer |
| Model Number: | UB110 |
| Brand: | Mueller |
| Power Source: | Battery Powered (Lithium Ion) |
| Charging Time: | Approx. 1 hour |
| Minimum Cutting Length: | 1 mm (0.04 inches) |
| Maximum Cutting Length: | 10 mm (0.4 inches) |
| Waterproof: | Yes |
| Blade Material: | Stainless Steel (Titanium Bi-directional) |
| Included Components: | Protective cap |
| Item Weight: | 0.33 kg (11.68 ounces) |
Warranty and Support
The Mueller UltraOneBlade Trimmer comes with a 1-year warranty. For warranty claims or technical support, please refer to the contact information provided with your purchase or visit the official Mueller website. Ensure you have your model number (UB110) and proof of purchase available.