The difference between a microneedling treatment that feels professional and one that feels like a craft project is usually the pen, not the technique. Corded pens tug mid-pass. Pens without a speed display leave you guessing the setting. Pens with fixed batteries die halfway through a client. The Dr Pen A8S was built to remove those three annoyances — and it has become one of the most commonly stocked wireless pens in salons for exactly that reason. Here is an honest look at what it does well, what it does not do, and who should buy it.
What the Dr Pen A8S Is
The A8S is a cordless, rechargeable microneedling pen (collagen induction device) designed for both home users and salon practitioners. It uses disposable, single-use needle cartridges that stamp vertically into the skin at high frequency, creating controlled micro-channels. Those channels do two things: they let topical serums penetrate far beyond surface application, and they trigger the skin's natural repair response, which supports collagen and elastin production over a course of sessions.
The pen sits in the middle of the Dr Pen lineup — above basic entry-level pens, below the larger professional systems — and its feature set reflects that position.
Key Features That Matter in Practice
- Wireless with a removable battery — the pen runs on a rechargeable battery pack that unclips from the body. When one runs low you swap in a charged one and continue; for salons doing back-to-back sessions this is the feature that justifies the price over a fixed-battery pen.
- Adjustable depth 0–2.5 mm — the depth dial covers the full range from superficial nano-style passes (0.25 mm for product absorption) to deeper settings for scar and body work (1.5–2.5 mm, trained practitioners only).
- 6 speed levels with LED digital display — the screen shows the active speed level and battery status, so settings are visible mid-treatment rather than guessed from a dial position.
- High-speed motor — the motor runs up to roughly 18,000 RPM across the six speed settings (per the manufacturer's A8S specifications), which keeps needle insertion fast and smooth at working depths.
- Low-vibration, vertical stamping mechanism — the needles move vertically rather than dragging, which is what gives clean micro-channels instead of skin tears.
- Anti-backflow cartridges — the A8S uses the M8S/A9/A11-generation cartridges with a silicone anti-backflow membrane that stops serum and fluids from being drawn into the handpiece motor.
- Regional plug options — US, EU, UK, AU, and KR charger variants are available.
Cartridges: The Consumable That Actually Determines Results
The pen is a one-time purchase; cartridges are the recurring cost, and they matter more than the pen itself. The A8S accepts seven anti-backflow cartridge types shared with the M8S, A9, and A11 pens (per the Dr Pen compatibility listing):
- 12-pin — fine lines, general rejuvenation, first-time clients
- 18-pin — texture refinement and general facial work; the 18-pin uses thinner needles (around 0.18 mm) for a more comfortable pass
- 24-pin — moderate treatment on larger facial areas
- 36-pin — deeper scar revision, stretch marks, body areas
- 42-pin — maximum coverage for high-volume body treatments
- Nano-R (round) and Nano-S (square) — surface-level serum infusion with no real penetration; for sensitive skin, periorbital work, and frequent maintenance passes
General rule: more pins means wider coverage per pass, fewer pins means more targeted work. Cartridges are gamma-sterilized, individually blister-packed, and single-use — one cartridge per client, discarded after the session. Generic lookalike cartridges are a real problem in this category: the anti-backflow membrane is the part cheap copies most often fake, and a failed membrane lets fluid into the motor, which ruins the pen and creates cross-contamination risk. Stick to genuine cartridges — the full pin-type and depth breakdown is in our Dr Pen cartridge pin types and needle depth guide. Spare cartridges are available here (sold separately).
Depth and Frequency: What the Evidence-Based Ranges Look Like
The depth dial only works if you use the right part of it. Practical reference ranges, consistent across practitioner guidance and the microneedling depth literature:
- 0.25 mm — product absorption and maintenance; reaches only the upper epidermis, minimal downtime, can be repeated as often as every 1–2 weeks
- 0.5 mm — fine lines, brightness, mild texture; the start of real collagen response; allow roughly 2–4 weeks between sessions
- 1.0 mm — moderate texture, mild scarring, pigmentation; the deepest practical setting for experienced home users
- 1.5–2.5 mm — deep scars, stretch marks, dense body scar tissue; trained professionals only, with 4–6 week (or longer) intervals
Two rules from the depth literature are worth internalizing: deeper is not better — past the right depth you only add downtime and risk — and the same depth does not belong on the whole face (per the Pro Needling depth chart and practitioner interval guidance). The eye area stays at 0.25 mm maximum; cheeks can go deeper; body work goes deepest. Always start shallow and adjust to skin response.
Who the A8S Is Best For
- Home users who want one device for the long term — the depth range covers from beginner 0.25 mm passes up to 1.0 mm experienced work, so the pen is not outgrown after six months.
- Mobile therapists and small salons — wireless operation plus swappable batteries means no cable management and no mid-session charging stop.
- Clinics that already use M8S/A9/A11-generation cartridges — cartridges are shared across these models, so stock stays simple.
Limitations Worth Knowing Before You Buy
- The deep end of the depth range (1.5–2.5 mm) requires professional training, numbing, and sterile protocol — it is not a home setting.
- Cartridges are an ongoing cost and must be genuine; cheap generics are a false economy.
- The pen does not deliver serum automatically — you apply serums topically during the pass. If you want automatic serum infusion through the cartridge, the Hydra Pen H3 (see below) is the device built for that.
- Battery life is rated for roughly 3–4 hours of use per charge; a salon doing full-day sessions should keep a second battery swapped in.
Dr Pen A8S Specifications
- Model — Dr Pen A8S (Ultima series)
- Power — rechargeable removable battery (wireless) with wired module option
- Needle depth — 0–2.5 mm adjustable
- Speed — 6 levels, up to ~18,000 RPM, LED digital display
- Weight — ~0.4 kg
- Cartridges — 12/18/24/36/42-pin + Nano-R / Nano-S, anti-backflow membrane (sold separately)
- Plug options — US / EU / UK / AU / KR
- In the box — pen, rechargeable battery, charger (regional plug), user manual
The Dr Pen A8S wireless microneedling pen is available here with your regional plug type. If you are still comparing models, the main alternative is the Hydra Pen H3 — same cordless convenience, but with a built-in 3 ml serum reservoir for automatic infusion during the pass.
Frequently Asked Questions
Is the Dr Pen A8S suitable for home use?
Yes, within the appropriate settings. Shallow settings of 0.25–1.0 mm are practical for trained home users following proper sterilization and aftercare protocol; settings from 1.5 mm upward are for professional practitioners only. Beginners should start at the lowest depth and speed and build up.
What cartridges does the Dr Pen A8S use?
The A8S uses the same anti-backflow cartridge family as the M8S, A9, and A11 pens: 12-, 18-, 24-, 36-, and 42-pin plus round nano and square nano tips. Cartridges are single-use, gamma-sterilized, and sold separately.
How is the A8S different from the Hydra Pen H3?
The A8S is a classic microneedling pen — serum is applied topically during treatment. The H3 is a hydra pen: it holds serum in a 3 ml reservoir in the cartridge and dispenses it automatically through three flow levels while needling. Choose the A8S for deeper settings (up to 2.5 mm) and salon-grade power; choose the H3 for automatic serum infusion and gentler, shallow-to-medium work.
How often should I use a microneedling pen?
Frequency depends on depth. At 0.25 mm, maintenance passes can be repeated roughly every 1–2 weeks; at 0.5 mm, wait 2–4 weeks; at 1.0 mm and above, sessions are spaced 4–6 weeks apart to allow full collagen remodeling. Deeper treatments need longer recovery — more sessions do not produce faster results.
Does the Dr Pen A8S come with cartridges?
The pen package includes the device, rechargeable battery, charger, and manual. Needle cartridges are consumables and are sold separately, so order cartridges with the pen — you cannot run a treatment without them.
Brand Disclaimer: Dr. Pen® is a registered trademark of its respective owner. iTech Aesthetics is an authorized reseller of genuine Dr. Pen products. We are not the manufacturer. All Dr. Pen products sold through our store are authentic and sourced through official distribution channels. This content is intended for trained aesthetic professionals and informed home users, is provided for informational purposes only, and does not constitute medical advice. Always follow device manuals, manufacturer protocols, and applicable local regulations.
Originally published by iTech Aesthetics — professional aesthetic and physiotherapy equipment for clinics and studios worldwide.