Introduction
The Wahl Beard Trimmer Model 5537-420 is a battery-operated grooming kit designed for precise trimming of facial hair, mustaches, beards, and necklines. This versatile kit also includes a bonus battery-operated nose and ear hair trimmer for complete grooming. The trimmer features self-sharpening precision blades and comes with various guide combs to achieve desired hair lengths.

Image: Wahl Beard Trimmer and Nose/Ear Trimmer Kit.
Safety Information
- Use with caution near face and eyes.
- Keep out of reach of children.
- Avoid ingestion or inhalation of small parts.
- Clean properly and safely dispose of batteries.
Kit Contents
Your Wahl Beard Trimmer kit includes the following items:
- Wahl Beard Trimmer
- Bonus Battery-Operated Nose & Ear Trimmer
- 3 Individual Beard Guide Combs (Stubble, Medium, Full)
- 1 Adjustable 5-Position Guide Comb
- Blade Oil
- Cleaning Brush

Image: All components included in the Wahl Beard Trimmer Kit.

Image: Individual beard guide combs for different lengths.

Image: Adjustable 5-position guide comb.
Setup
Battery Installation
The beard trimmer requires 2 AA batteries, and the bonus nose & ear trimmer requires 1 AA battery. Batteries are not included.
- Carefully open the battery compartment on the back of the beard trimmer.
- Insert 2 AA batteries, ensuring correct polarity (+/-).
- Close the battery compartment securely.
- For the nose & ear trimmer, open its battery compartment and insert 1 AA battery with correct polarity.
- Close the nose & ear trimmer battery compartment.

Image: Battery installation for the beard trimmer and nose trimmer.
Attaching Guide Combs
To attach a guide comb, align the comb with the trimmer blade and press firmly until it clicks into place. To remove, gently pull the comb away from the blade.
Operating Instructions
Beard and Mustache Trimming
- Ensure the trimmer has fresh batteries.
- Select the desired guide comb (individual or 5-position adjustable) for your preferred beard length (1/16" to 1/2").
- Attach the chosen guide comb to the trimmer blade.
- Power on the trimmer.
- Hold the trimmer with the blade flat against your skin and move it slowly against the direction of hair growth.
- Trim your beard and mustache to the desired style and length.
Nose and Ear Hair Trimming
- Ensure the nose & ear trimmer has a fresh AA battery.
- Power on the nose & ear trimmer.
- Gently insert the trimmer tip into your nostril or ear canal.
- Move the trimmer in a circular motion to remove unwanted hair.
- Do not insert the trimmer too deeply into the nostril or ear canal.

Image: Using the bonus nose and ear hair trimmer.
Maintenance
Cleaning Blades
The blades of both the beard trimmer and nose trimmer are rinseable for easy cleaning.
- Turn off the trimmer before cleaning.
- For the nose trimmer, angle the head downward and rinse under running water.
- For the beard trimmer, remove any attached guide combs. Use the cleaning brush to remove loose hairs from the blades. The blades can also be carefully rinsed.
- Allow blades to air dry completely before reattaching combs or storing.

Image: Rinseable nose trimmer blades being cleaned.
Oiling Blades
To maintain optimal performance and blade longevity, oil the trimmer blades regularly.
- Ensure the trimmer is turned off.
- Apply 2-3 drops of Wahl clipper oil across the top of the blades.
- Turn the trimmer on for a few seconds to allow the oil to distribute.
- Wipe off any excess oil with a soft cloth.
Video: Demonstration on how to oil Wahl trimmer blades for optimal performance.
Troubleshooting
If your trimmer is not functioning as expected, consider the following:
- Trimmer does not turn on: Check that batteries are inserted correctly with the correct polarity. Replace old batteries with new ones.
- Trimmer pulls hair or cuts poorly: Ensure blades are clean and free of debris. Apply blade oil as described in the Maintenance section. Blades may need to be replaced if dull.
- Nose/Ear Trimmer is ineffective: Ensure the battery is fresh. Clean the trimmer head thoroughly.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 5537-420 |
| Power Source | Battery Powered (2 AA for trimmer, 1 AA for nose trimmer) |
| Blade Material | High Carbon Steel |
| Maximum Cutting Length | 0.5 Inches |
| Included Components | Beard Trimmer, 3 Individual guide combs, 5-Position adjustable comb, Bonus Nose & Ear Trimmer, Blade Oil, Cleaning Brush |
| Product Dimensions | 3.25 x 5.75 x 10.5 inches |
| Item Weight | 7.05 ounces (200 Grams) |
Warranty and Support
This Wahl Beard Trimmer Model 5537-420 comes with a 2 Year Limited Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical support, or replacement parts, please refer to the contact information provided in your product packaging or visit the official Wahl website. Keep your proof of purchase for warranty validation.