JezailFunder Jiffy75 (SP75) Advance Review｜Easy-to-use left-right split 75% keyboard with low switching costs

If you have passed up Cornix, this one may actually be the real deal.

JezailFunder’s latest offering, the Jiffy75 (SP75), is an ergonomically oriented mechanical keyboard that reflects feedback from its predecessor, Cornix, and completely separates the left and right sides while maintaining the most user-friendly “75% alignment”.

Even though it is ergonomic, the content is the familiar horizontal shift (row staggered layout), and although it is split left and right, it can also be used as an integrated unit.

Although it is an English-language keyboard, it does not have the special layout of Cornix, making it an easy-to-use keyboard with low switching costs.

This section details a new unit that combines a Cornix-like aluminum housing with a unique quiet design.

The keyboards shown here are currently only available through crowdfunding. Please consider this carefully, as prices will likely be difficult to keep current after crowdfunding ends.

Jezail Funder SP75 was loaned by Jezail Funder Japan (LLC) for promotional purposes.
GreenEchoes Studio, which operates Greenkeys, may receive compensation if a contract is signed from a link in this article.

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Price, sales format, and availability

• Availability: ★★☆☆☆☆ (Rare as it is only available through crowdfunding)
• Price range: $199 – $219 (depending on type of pledge)
• Sales format: Pre-order sales (Kickstarter)
• Sales period: March 10, 2026 at 21:00 (Japan time) – March 28, 2026
• Where to get it: Kickstarter
• Scheduled delivery: Mid-April to early May 2026 (depending on the time of support)

Kickstarter Schedule

Jiffy75 is currently available in crowdfunding format on Kickstarter. Early backers will receive more favorable pricing and Day 1 rewards.

Campaign Schedule

• Campaign Period: March 3, 2026 at 21:00 (Japan time) – March 28, 2026
• Scheduled delivery: Shipping will begin sequentially from mid-April 2026 (until early May, depending on the batch).

Detailed Schedule

• March 3, 2026 – March 28, 2026: Crowdfunding in place
• Mid-March to April 2026: Preparation for mass production of the first lot
• Mid-April 2026: Day 1/Super Early Bird: Will be shipped in advance
• Late April – early May 2026: Main lot shipped
• May 2026 (conditional): Large-scale production (if the number of orders exceeds the limit)

Price on Kickstarter

Prices on the Kickstarter are as follows

The earlier you buy, the more you tend to save.

Benefit name	Price (USD)	Number of units sold	Contents	remarks
Day 1 Special	$199	Unlimited (24h)	Jiffy75 x 1 / Exclusive pouch x 1	One limited edition keycap set included (confirm details)
Super Early Bird	$199	100 pieces	Jiffy75 x 1 / Exclusive pouch x 1	One limited edition keycap set included (confirm details)
Early Bird	$209	200 pieces	Jiffy75 x 1 / Exclusive pouch x 1
KS Special	$219	limitless	Jiffy75 x 1 / Exclusive pouch x 1
Jiffy75-Combo	$398	not specified	Jiffy75 x 2 / Exclusive pouch x 2	Two limited edition keycap sets included (confirm details)

Accessories and Options

• Exclusive wood wrist rest: $99 (available in walnut or maple)
• Additional keycap set: $29 (black-on-white printing/white-on-black printing/white-on-gray printing/orange-on-white printing)
• Kailh Low Profile Switch: $39
• Additional carrying case: $39 (one standard with the unit)

JezailFunder Jiffy75 (SP75 ) Specifications Overview

The Jiffy75 is a separate model, yet encompasses the CNC aluminum enclosure and unique silent switch required for high-end machines.

Available in four colors.”

Available Colors

• Name: Orange｜Orange x White Keycaps (orange printing)
• Name: White｜Silver x White Keycaps (printed in gray)
• Name: Black｜Walnut x Black Keycaps (printed in black)
• Name: Silver｜Maple x White Keycaps (black printing)

Palm rests are optional and must be purchased separately.

Summary of official specifications

The following is organized based on the information posted on the official page.

• Layout: 75% split layout
• Connection method: Tri-Mode (USB Type-C / Bluetooth / 2.4GHz Wireless)
• Hot-swappable
• Equipped with control knob
• Wooden accent parts (Black/Silver)
• Supported OS: Windows / macOS (*in accordance with the official description)

contents

The contents of a regular Jiffy 75 are as follows

• Keyboard body (one left and one right)
• carrying case
• Type-C Cable
• Backup switches (2)
• 2.4GHz dongle
• Keycap/Key switch puller

JezailFunder Jiffy75 (SP75 ) – Review Environment

The review environment is as follows

• Connection environment: macOS
• Switch used: Kailh Deepsea Island MINI Pink(37gf) Linear
• Layout: ANSI 65% layout base (left-right split)
• Primary use: content writing (typing Japanese)

JezailFunder Jiffy75(SP75 )-Evaluation of keystroke feel and sound

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The following is a review.

About JezailFunder Jiffy75 (SP75 )

Practical left-right split keyboard with low switching costs

I still feel that Jezail Funder’s work this time around has the great advantage of fulfilling a market need.

The author believes that the reason behind Cornix’s mega-hit was still the “large switching cost.

In that sense, Jiffy75’s horizontal displacement layout x split x low pro is the best solution at the moment.

Build quality is very high and satisfies the desire for ownership

Jiffy75 has very high build quality.

The wood workmanship is excellent, but what caught the author’s attention was the quality of the “machined aluminum body” finish.

It is unbelievable that the top case and switch plate can be molded in one piece and machined with such precision.

The paint job was excellent and we had no complaints about the exterior without discovery.

Wide variety of colors

Jiffy75 is available in a wide variety of colors.

Selectable coloring

• Orange x White Keycaps (orange printing)
• Silver x White Keycaps (gray printing)
• Walnut x Black Keycaps (black printing)
• Maple x White Keycaps (black printing)

If you want to add a touch of austerity or want a dedicated wrist rest, you may want to use walnut accents/maple accents.

On the other hand, if you want to decorate your desk with a little pop, orange and silver are also very good choices.

It might be possible to buy more than one of these.

It will be fun to use it on a daily basis.

Great balance of artifacts x wood.

I’m quite biased because the one I reviewed this time was a walnut model, but man-made x wood is

Good…”

I felt that it was a good idea.

Good key feel and can be used in the office without hesitation

The Jiffy75 is designed with office use in mind.

Although they do not use gasket-mounted construction, their newly developed ultra-lightweight, silent MIST linear switches are supposed to be quiet enough to be used in an office setting.

With a fairly light pressure of 37gf, even women will find it attractive to type with a light touch.

As for the key switches used in the review, they are close to the specifications as they are prototypes.

Supports key mappingsoftware (JZF Hub)

Jiffy75 supports keymap changes using original software.

Details have not yet been disclosed, but the UI (user interface) is expected to be intuitive and easy to operate.

The Jiffy75 has a control knob, which is assigned to media controls such as volume control in the standard configuration.

We can hope that you can change the keymap to include this as well.

Amazing battery life frees you from wires

The Jiffy75 boasts a threatened battery life.

It is equipped with a 2800mAh battery on each side, and lab test values show a maximum battery life of approximately 1.5 months on the left hand side / 2 months on the right hand side, which is amazing.

Tri-Mode Wireless (USB/Bluetooth/2.4G) support｜Fully wireless, split keyboard available

Jiffy 75 supports Tri-Mode connection.

– USB Type-C wired connection
– Bluetooth wireless connection
– 2.4GHz dongle connection

For split keyboards, the stability of left-to-right communication is also important.

The fact that it supports full wireless connectivity, including left-to-right connection, is great.

Wired connection is possible, but it should be noted that the connection between the left and right side is a wireless connection.

Cautions to check before buying JezailFunder Jiffy75 (SP75 )

No Japanese-language layout, so general users need some familiarity with it

The Jiffy75 lineup is available only in ANSI (English-language layout); Japanese-language layout is not available.

Therefore, it should be noted that users who normally use Japanese-language layouts may find it difficult to use.

• Windows users need to set up their own keymap because there are no half/full-width keys or conversion/non-conversion keys.
• Mac users must set up their own keymap, as there are no alphanumeric or kana keys.
• When connected to Windows with Japanese language settings, the device is often recognized as having a Japanese layout, which may cause the actual key printing to differ from the character string to be input. To avoid this situation, it is necessary to use a separate software such as USkey2JP.

Possibility of difficulty coping with left-right division without mastering touch typing

The Jiffy75, as you can see, is a split left-right keyboard.

It is the author’s impression that touch typing is often necessary when typing with some distance between left and right sides.

A particular bottleneck is the “central input”.

In many cases, the so-called “points that should be pressed with the index finger in touch typing,” such as B, N, T, Y, G, and H, are ambiguous in our own style, and problems such as “I cannot press B with my right hand” may easily occur.

In addition, the English layout means that the symbols are in different positions, and it may take some time to get used to them.

Price is a little high for a keyboard

Jiffy75 is slightly more expensive for a keyboard.

Available from $199.00, which is about 30,000 Japanese yen. (converted to Japanese yen at an exchange rate of 155 yen to the dollar)

For those who are into keyboards, many feel that releasing a keyboard of this quality at this price is “cheap”.

On the other hand, it is natural for ordinary gadget fans to feel that the price is somewhat high.

[Photos] JezailFunder Jiffy75 (SP75 ) Review

Now let’s look at some actual photos of Jiffy75.

Unlike Cornix, it comes in a black cosmetic box like this one.

Perhaps even more may be created by the division.

The inscription reads, “The first time I saw the world, I was a little bit surprised.

When you open the box, you will find a special storage pouch.

It is well made.

The center zipper opens all the way around, and the structure is divided into left and right sides.

This storage zipper opens to reveal a USB cable, dongle, spare switch, and keycap/key switch puller.

Opening this lid reveals the keyboard.

The walnut and black model was reviewed this time.

The exterior looks like this.

One aluminum rotary encoder is attached to the upper left and right ends.

It is based on a 65% ANSI layout with no function key rows and arrow keys, in the form of an additional single row of five key switches on each side.

Another distinctive feature is the independent placement of keys for thumb operation.

The quality of the aluminum rotary encoder knob is also high, with a moderate clicking sensation during rotation and a high impression of rigidity during operation.

In addition, basic printing is similar to Mac.

Replacement keycaps for Windows are not included in the package, so if necessary, it is recommended to purchase unmarked keycaps or other keycaps from the Jezail Funder Japan website.

Let’s look at the sides.

As for the sides, the slide switch/Type-C port is located only on the back, nothing else.

These two USB ports give the impression of being “for charging,” and the basic connection (communication between the left and right sides and with the connected PC unit) is made via a wireless connection.

The slide switch slides in the same direction for both left and right. Note that this can easily be misinterpreted as a “center to center←→left and right to right” operation.

The reverse side is quite simple.

Bar-type rubber feet are attached to the four corners, and there are no tilt legs.

Although we were not able to disassemble it as it was a loaned item, we have the impression that it is probably constructed with a lid that is attached to a top case that is integrally molded with the keystitch plate.

As shown here, the rear side is slightly higher and slopes slightly toward the front.

The keyboard height is approximately 23 mm to the tops of the keys, allowing for problem-free typing without a palm rest.

The keyswitch is based on the Kailh choc v2 standard.

(The photo is a prototype and has a different switch from the product.)

Of course, hot-swapping is supported.

No LED lights are mounted.

As you can see, the keyswitch plate is made of the same aluminum as the main unit.

The keystroke feel is not so hard, probably due to the sound-absorbing material that seems to be installed and the effect of the silent switch.

The space bar section has stabilizers.

Other features include stabilizers on the left shift, right shift, enter, and backspace areas.

Let’s look at keycaps.

The keycaps are made with Jezail Funder’s original LAK profile,

The key tops are characterized by their arched shape.

All keycap shapes are identical and there is no difference in slope from row to row.

The keycaps are made of PBT and the printing is believed to be sublimation printing.

The walnut model is printed in black on black, which is not as legible as the walnut model.

The molding accuracy of the LAK keycaps is very high, and the area around the cross stem is well molded.

Finally, let’s look at the big picture.

After all, the walnut case with black keycaps model looks great with a black felt desk mat.

It is possible to use them separately in this way, and until you get used to them, you can also use them as an integrated unit.

The fact that the system has a fully wireless connection, so there are no extra cables on the desk, was also a very positive impression.

The fact that not only the space bar but also the keys next to it have different shapes also contributes to the ease of pressing.

summary

This is my review of Jiffy75.

Unlike Cornix, it has a normal layout, making it an ideal left-right split keyboard for those who value both appearance and practicality.

Although there is some concern about the fact that the lineup only includes English-language keyboards, unless you are a programmer who uses a lot of symbols in your daily typing, you may be able to use this keyboard without too much resistance.

Don’t miss this opportunity to get a discounted price on the Kickstarter.