Ekrin B37 v2 (Green) review

This is a desk assessment of Ekrin's current Green B37 v2 listing, not a hands-on test. The manufacturer's variant record identifies the Green finish as SKU EA-B37G2. The page calls the B37 full-size and lists 2.2 lb; converting that claim gives about 998 g, while the matching manual rounds net weight to 1 kg. Neither source states attachment basis. I have not independently weighed the gun, so treat it as a figure close to—rather than safely below—the finder’s 1,000 g threshold.

Five speed steps and an angled handle

The current B37 page lists five speeds from 1,400 to 3,200 rpm and a 15-degree angled handle. Ekrin presents that angle as a reach aid, but it is not proof of a comfortable grip for every user. Four supplied locking heads are named: Flat, Bullet, Round (Silicone) and Fork. Unlike the Black Kestrel package, the Green B37 does not list an Air Cushion head, Cone or scroll wheel, and it has one fewer speed position. These are tangible package and control differences; they do not establish better coverage or treatment outcomes. See the current B37 page and manufacturer comparison.

Do not treat every B37 as the same generation

The B37 name spans materially different hardware. Ekrin's support guide distinguishes B37 v1—with a round barrel charging socket and push-fit heads—from B37 v2, which charges over USB-C Power Delivery and uses locking heads. This review concerns the Green v2 SKU EA-B37G2, not a generic B37, B37S or older package. The current manual specifies the v2's USB-C PD arrangement and a ten-minute automatic stop, and says the USB charging adapter is not included. A B37 v1 charger or head should not be assumed compatible. Check the physical connector, head attachment and exact model-specific manual before buying accessories or a used unit; the B37 manual page explains the version distinction.

Case, battery and what the numbers do not tell you

The comparison page lists a travel case, and the case page identifies a B37-specific size; confirm the case is included in the exact package rather than inferring it from a gallery image. The current manual specifies a 2,600 mAh battery. The product page says “up to” eight hours, but supplies no speed, pressure, battery-age or other test conditions. The page also publishes 35–55 dB without a stated speed, distance, room or measurement method. Neither figure is an independent runtime or sound test, and neither guarantees quiet operation or a full day of use. Ekrin's listed motor and rpm specifications are likewise not a measurement of delivered force or therapeutic effect.

Where it sits beside Kestrel and Bantam

Within this Ekrin trio, B37 v2 is the middle choice by documented controls and package: a full-size 2.2 lb body, five speed steps and four named heads. Kestrel is also listed at 2.2 lb but has six speeds, a scroll wheel, six heads and a 13 mm stroke claim. Bantam is listed at 1.1 lb, is called compact, has three fixed settings and four heads. These comparisons help describe trade-offs, not rank performance. If you care most about portability, a full-size B37 is not the compact-format answer; if you care about the exact Air Compression head, none of these three kits lists it. If an exact named head set is essential, compare the written kit list rather than translating similarly shaped attachments into another brand's terminology.

Practical fit and limitations

The Green B37 v2 may suit a shopper who wants a full-size handle with five speed positions, four familiar shapes, an included model-specific case and USB-C charging. Its limits include the nearly 1 kg listed body, only four head names, an adapter sold separately according to the manual, and an eight-hour maximum claim with no test protocol. The manufacturer calls it quiet but provides a 35–55 dB range without conditions; “quiet” should not be read as an independently measured promise. The manual recommends avoiding wet skin, bruises and open wounds and advises consulting a professional for listed health situations. Read its complete precautions; this review cannot establish personal medical suitability. Before purchase, verify Green, EA-B37G2, v2 locking-head hardware, USB-C PD, the supplied cable, the adapter situation and whether the case appears in the exact seller's box list.

Assessment limit: no independent handling, mass, noise, runtime, force or treatment testing was performed. The product's maximum battery figure and sound range remain manufacturer claims.

Open-box B37 v2 is a condition listing, not the Kestrel

Ekrin's separate open-box listing has an exact structured variant SKU, EA-B37G2-OB, and its product-specific section names the B37, four included heads, five speeds from 1,400 to 3,200 rpm and a 35–55 dB claim. Later in that same page, a reusable feature block describes the Kestrel's six speeds and 1,800–3,500 rpm range. That block conflicts with the B37-specific section and the current B37 manual; it is not used as evidence for this model. The exact SKU plus the model-specific B37 v2 manual support treating the listing as an open-box condition variant of the Green B37 v2, rather than a new gun or a Kestrel configuration. The open-box page stated one-year warranty, all-sales-final/no-returns terms and “Out of stock” on 2026-10-31. It does not provide a dependable separate audit of every case, cable and accessory in a future seller's box, so verify contents and terms for the precise offer.

See the Ekrin B37 open-box listing and its structured variant record; this assessment remains about the current Green v2 device, not a guarantee of open-box completeness or availability.