LED face masks · head to head

Dr. Renú LED Anti Hair Loss Cap vs
Kiierr 272 Premier Laser Cap

Two of the nine hair-growth devices in our full comparison, isolated so the meaningful differences are easier to see. Every figure comes from a manufacturer source.

The short answer

Dr. Renú is the only device of these two to use 850 nm near-infrared and to publish output per cm². Kiierr uses 272 laser diodes (no LEDs); its published output is 1,360 mW total; no per-cm² figure. That is a specification difference, not proof of better regrowth from either device.

Side by side

The specifications

Manufacturer-published specifications, checked 20 August 2026.
Specification	Dr. Renú LED Anti Hair Loss Cap	Kiierr 272 Premier Laser Cap
Light source	192 LED cores in 96 dual-chip modules (no lasers)	272 laser diodes (no LEDs)
Wavelengths	660 nm850 nm	650 nm
Published output	30–45 mW/cm² (20–30 at 660 nm + 10–15 at 850 nm)	1,360 mW total; no per-cm² figure
Session	10 min, daily	30 min, every other day
Modes	Continuous, 10 Hz or 40 Hz pulse · 5 intensity levels	Pulsed output, auto shut-off
Regulatory	No device-specific FDA clearance published	FDA cleared (stated; no number printed)
Fit & power	Soft fabric cap Rechargeable 2000 mAh USB-C, cordless	Soft baseball-style cap Rechargeable battery pack

“Published output” means a figure printed on the brand’s own product page or manual. A total milliwatt figure cannot be converted into a dose without the treated area — only an output per cm² can. “FDA cleared” is not “FDA approved” — see the FAQ.

Where they differ

Light source: Dr. Renú LED Anti Hair Loss Cap: 192 LED cores in 96 dual-chip modules (no lasers). Kiierr 272 Premier Laser Cap: 272 laser diodes (no LEDs).
Wavelengths: Dr. Renú LED Anti Hair Loss Cap: 660 nm, 850 nm. Kiierr 272 Premier Laser Cap: 650 nm.
Published output: Dr. Renú LED Anti Hair Loss Cap: 30–45 mW/cm² (20–30 at 660 nm + 10–15 at 850 nm). Kiierr 272 Premier Laser Cap: 1,360 mW total; no per-cm² figure.
Session: Dr. Renú LED Anti Hair Loss Cap: 10 min, daily. Kiierr 272 Premier Laser Cap: 30 min, every other day.
Regulatory: Dr. Renú LED Anti Hair Loss Cap: No device-specific FDA clearance published. Kiierr 272 Premier Laser Cap: FDA cleared (stated; no number printed).
Fit & power: Dr. Renú LED Anti Hair Loss Cap: Soft fabric cap; Rechargeable 2000 mAh USB-C, cordless. Kiierr 272 Premier Laser Cap: Soft baseball-style cap; Rechargeable battery pack.

Evidence notes

What the specifications don’t tell you

Dr. Renú LED Anti Hair Loss Cap

The Dr. Renú LED Anti Hair Loss Cap uses 192 LED cores in 96 dual-chip modules (no lasers) at 660 nm, 850 nm, in sessions of 10 min, daily.

The only device in the table to publish irradiance per cm² — the figure a dose calculation actually needs — and the only one to add near-infrared at 850 nm, which has thinner hair-specific evidence than red. The counterweight: its efficacy figures come from third-party LLLT literature rather than a trial of this device, and it publishes no device-specific FDA clearance, which every US laser cap here claims.

Kiierr 272 Premier Laser Cap

The Kiierr 272 Premier Laser Cap uses 272 laser diodes (no LEDs) at 650 nm, in sessions of 30 min, every other day.

Its headline results — +29 hairs/cm² against +3 for placebo — come from LLLT literature rather than a Kiierr-run trial of this cap. On paper it is near-identical to the illumiflow 272 Pro: 272 lasers, 650 nm pulsed, 1,360 mW, 30 minutes every other day.

Questions

Common questions

What is the main difference between Dr. Renú and Kiierr?

Dr. Renú LED Anti Hair Loss Cap: 192 LED cores in 96 dual-chip modules (no lasers). Kiierr 272 Premier Laser Cap: 272 laser diodes (no LEDs).

Dr. Renú LED Anti Hair Loss Cap: 660 nm, 850 nm. Kiierr 272 Premier Laser Cap: 650 nm.

Dr. Renú LED Anti Hair Loss Cap: 30–45 mW/cm² (20–30 at 660 nm + 10–15 at 850 nm). Kiierr 272 Premier Laser Cap: 1,360 mW total; no per-cm² figure.

Does the higher diode count mean better hair growth?

Not on its own. Diode counts here run from 80 (Theradome) to 282 (iRestore Professional), and four devices share exactly 272. Count mainly determines how evenly light reaches the scalp; the dose is output per area multiplied by session time — and Theradome, with the lowest count, publishes more regulatory paperwork than any 272-diode cap.

Treat diode count the way the mask table treats LED count: a coverage figure, not an efficacy figure.

Which has stronger regulatory documentation?

Dr. Renú LED Anti Hair Loss Cap: No device-specific FDA clearance published. Kiierr 272 Premier Laser Cap: FDA cleared (stated; no number printed).

Eight of the nine claim FDA clearance, but only 2 print a searchable 510(k) number anywhere on their own site: illumiflow (K162071) and Theradome (K171775, K122950 and K113097). The Dr. Renú cap publishes no device-specific clearance at all — the only device here that does not claim one.

As on the face-mask side: these devices are FDA cleared, not FDA approved. Clearance means substantial equivalence to a device already on the market plus safety testing — a manufacturing and safety signal, not proof the device will regrow your hair.

Keep comparing

Compare Dr. Renú with every hair device

Hair growth cap and helmet comparison Dr. Renú vs Capillus CapillusPro Dr. Renú vs CurrentBody Skin LED Hair Growth Helmet Dr. Renú vs HairMax PowerFlex Laser Cap 272 Dr. Renú vs illumiflow 272 Pro Laser Cap Dr. Renú vs iRestore Essential Dr. Renú vs iRestore Professional Dr. Renú vs Theradome PRO LH80

Dr. Renú LED Anti Hair Loss Cap vsKiierr 272 Premier Laser Cap