Wahl Micro Groomsman 5640-600 Personal Trimmer
- 2 interchangeable heads, detail and rotary
- 0.5 to 1 mm cutting length
- AAA battery power, cordless, no charging
- Anodized aluminum housing, pen style
- 3.6 ounces, 1 x 2.5 x 8.75 inches
- 3 year limited warranty
- Body not waterproof, heads detach to rinse
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact, battery-run pen trimmer that splits nose and ear work from brow and beard detailing with separate heads. It only cuts very short, so it handles touch-ups, not beard length.
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ASIN: B0D14XN9NVCategory: Nose & Ear Hair Trimmers
Overview
Swapping between a rotary head for nose and ear hair and a detail head for brows, sideburns and the neckline, the Wahl Micro Groomsman covers small touch-ups from one pen-shaped body. Each head twists off with a quarter turn, and the battery loads under the head inside a metal sleeve.
Separate heads for the nose and for everything else make it a hygienic travel trimmer with a tough metal shell. It runs on a disposable battery, so carry a spare on longer trips.
Who it's for
Frequent travelers and anyone tidying stray hairs between barber visits get a pocketable tool with a separate head for the nose. Men who trim a full beard to a set length need a guarded trimmer instead.
Pros and cons
- Separate heads for nose and facial detailing
- Rugged anodized aluminum housing
- Small enough for a toiletry bag
- Heads swap with a quarter turn
- Runs on disposable AAA batteries
- Battery in the box not confirmed
- Very short cut length only
- Body is not waterproof
Performance notes
Cut length is fixed by the blade design, so the detail head trims stray hairs and edges right down rather than to a chosen length. Using the rotary head only inside the nose and ears separates that hair from facial trimming, which is the hygiene point Wahl builds the design around. A weak battery shows up as slower cutting, so swap it rather than pushing through.
Specifications
| Brand | Wahl |
|---|---|
| Dimensions & fit | |
| Maximum Cutting Length | 0.04 inches |
| Item Weight | 0.23 pounds |
| Item Dimensions | 1 × 2.5 × 8.8 inches |
| Minimum Cutting Length | 0.5 millimeters |
| Power & efficiency | |
| Power Source | Battery |
| Construction & materials | |
| Blade Material | Aluminum |
| Material Type | Aluminum |
| Color | Nickel/Black |
| Included components | |
| Unit Count | 2 |
| Number Of Packs | 1 |
| Warranty & support | |
| Manufacturer Warranty Description | 3 Year Limited Warranty |
| Other details | |
| Is Waterproof | No |
| Hair Type | All |
| Recommended Uses For Product | Face |
| Target Audience | Men |
| Other Special Features Of The Product | Beard & Stache, Nose |
| Specific Uses For Product | Beard & moustache, nose |
Frequently asked questions
Can I rinse the Wahl Micro Groomsman under the tap?
The heads detach and the title calls them rinseable, but the trimmer itself is listed as not waterproof. Remove the head before rinsing and do not let water reach the battery tray.
How do I change heads on the Wahl Micro Groomsman?
Pinch the head, turn it counterclockwise a quarter turn and lift it off. To fit the other head, line up its notches with the channel on the body, press down and turn clockwise until it locks.
Can the Wahl Micro Groomsman trim a beard to length?
No. It cuts between 0.5 and 1 mm and has no length guards beyond the eyebrow guide, so it is for edges and touch-ups, not setting beard length.
Why are there fibers on my new Wahl trimmer?
Wahl tests each trimmer with a hygienic fiber before packing. A few particles may remain; they are not hair and wipe off.