Logitech Signature K855 Wireless Keyboard Review – Unbeatable Mechanical Keyboard in 4 Colors!


Logitech Signature K855 Wireless Keyboard was released on August 4, 2022. The Signature K855 Wireless Keyboard was released on August 4, 2022.

Logitech had previously released a mechanical keyboard, the K835, which was wired and compatible with Windows, but the newly released K855 supports wireless connectivity via Bluetooth and is compatible not only with Windows but also with macOS, ChromaOS, Linux, and Android. Linux, and Android as well as Windows.

Logitech has a number of attractive mid-profile mechanical keyboards, such as the G913, but none of them support Macs, so core Logitech fans and Mac users have been waiting for the K855.

If you want to use a Logitech Mid (Hi) Profile mechanical keyboard on your Mac, the K855 is the perfect solution. K855 is the best solution.

We will review this K855 in this issue.

Logicool Signature K855
( 4 )
  • 価格が安い
  • BluetoothとUSB無線(Logi Bolt)の接続方式に対応
  • 打鍵感が優れている
  • 立てられるため収納スペースに困らない
  • アルミニウム質感が高く美しい
  • テンキーレスでコンパクト
  • 打鍵音が大きい(うるさい)
  • USB接続ができない
  • バックライトがない
  • ホットスワップ非対応
  • 裏蓋がチープで壊れそう
  • US配列がない

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Logitech Signature K855 Overview

Logicool SIGNATURE K855
Image credit: Logitech

Let’s begin with a summary of K855.

Body size

Height: 138.8mm Width: 355.2mm Depth: 38.8mm Weight (including batteries): 692.4g

Technical Specifications

  • Connection type: Bluetooth Low Energy wireless (Bluetooth 5.1)
  • Wireless communication range: 10 m Wireless communication range may vary depending on the operating environment and computer conditions.
  • Mechanical Switch: Red (Linear) Easy-Switch: Connect up to 3 devices and easily switch between them
  • Battery life: up to 36 months Battery life may vary depending on user and usage conditions.
  • Indicator lights: Caps Lock, Easy-Switch key and on battery.
  • Optional software: Logitech Options+ for macOS 10.15 or later and Windows ® 10, Windows 11 or later
  • Logitech Flow: Compatible with Logitech Flow-enabled mice
  • Backlight: None

Warranty Information

2-year free warranty

model number

  • Blue-gray: K855BG
  • Rose: K855RO
  • Graphite: K855GR
  • Off-white: K855OW

system requirement

Logi Bolt USB Receiver

  • Required: USB port
  • Windows 10, Windows 11 or later/macOS 10.15 or later/Chrome OS™/Linux®.

Bluetooth Low Energy

  • Required: Bluetooth Low Energy wireless technology
  • Windows® 10 or later macOS 10.15 or later iPadOS 14.0 or later iOS 14.0 or later Chrome OS Linux Android™ 8.0 or later
  • Internet access (when downloading Logi Options Plus software) Logi Options+.

included thing

  • Wireless Mechanical Keyboard
  • AAA alkaline batteries x 2 (installed)
  • Logi Bolt USB Receiver
  • Warranty and Warranty Policy

Information reference: https: //www.logicool.co.jp/ja-jp/products/keyboards/k855-signature-wireless-mechanical-tkl.920-011080.html

The K855 has a compact size with a tenkeyless keypad, and its most distinctive feature is the use of Mid Profile mechanical switches that are compatible with non-Windows devices.

Until then, Logitech products had pantograph keyboards such as the MX Keys series and low-profile mechanical keyboards such as the MX MECHANICAL, but not mid-profile mechanical keyboards.

This K855’s number one advantage is that it “works on Macs, too.” is that it can also be used on a Mac.

In terms of coloring, in addition to the existing “Graphite (K855GR)” and “Off White (K855OW),” new colors “Blue Gray (K855BG)” and “Rose (K855RO)” will be added on September 8, 2022, bringing the total to four colors.

Let’s take a closer look.

K855 price|A reasonable keyboard available for about 10,000 yen

691af9ff6a196b3487490a516959280e e1658021141194
Image reference: Logitech

Many people may think the price of a keyboard is “expensive” when they hear that the price is around 10,000 yen.

The cheapest keyboards are those that use a mechanical keyboard.

Many regular keyboards are less durable than mechanical keyboards, such as pantograph and membrane keyboards, which are quieter, have less keystrokes, and offer excellent cost performance, and many can be purchased for less than 5,000 yen.

On the other hand, mechanical keyboards use physical “switches” for inputting data, so they are generally more expensive than pantograph or membrane keyboards, with most costing 10,000 yen or more, due to the number of manufacturing processes and parts involved.

It is “inexpensive” to purchase a wireless mechanical keyboard for “about 10,000 yen” under the Logitech brand, which has authority in keyboard manufacturing.

It is my personal opinion that spending money on an input device, even if somewhat expensive, is not at all regrettable for those whose job is to type.

It will surely improve the efficiency of your work.

Axis type

ae29820915470a0c2a08e930ceed37a0 e1658021280481
Image reference: Logitech

The axis of the keys, the heart of the mechanical keyboard, is made by “TTC” of China.

Logitech K855 mechanical switches

pressing pressure45g±15g
Pushdown durability50 million times
Movement to operationnot yet officially announced
reactionLinear (red axis)

The MX MECHANICAL series released by Logitech on June 30, 2022, and Logitech’s mechanical keyboards for gaming, for example, use Logitech’s proprietary mechanical switches.

After all, developing a proprietary switch is expensive, so Logitech explains as follows.

Explain that TTC switches are used to keep costs down.

Quote: Mynavi News

I personally do not feel that the lack of proprietary switches is a disadvantage, as I believe that cost performance and performance can be better guaranteed if the keyswitches are manufactured by other companies rather than being developed independently.

We believe that it is more advantageous for Keychron to actively adopt axes other than its own and offer them at a reasonable price, except for high-end keyboards such as HHKB and REALFORCE, or even different.

Light typing even with the deep keystrokes characteristic of mechanical keyboards

75874e8e2716f36c35c6cf3491b9b260 e1658021197387
Image reference: Logitech

The key pitch of the K855 is 19mm, the same as a typical full-size keyboard, and compared to today’s compact notebook keyboards, there will be little “finger jamming” feeling.

TTC’s mechanical key switches have a key stroke of 4±0.4mm, which is about 1mm “deeper” than the MX MECHANICAL.

Since the “red axis” with its linear typing feel is adopted, there is no “catching” feeling in the middle compared to the brown or blue axes, and typing may be relatively smooth for those who usually type on a notebook keyboard as if stroking it.

However, since the key stroke of notebook computers such as Macbook is less than 1mm, using a mechanical keyboard requires a certain amount of “pushing in” work to be sure, so some degree of familiarity is considered necessary.

Nevertheless, the need to “push in surely” may reduce typing errors for those who are typing while stroking.

In general, the “red axis” of mechanical keyboards tends to be quieter in typing than other axes, making it suitable for office work.

However, compared to the quiet models of HHKB Professional Hybrid Type-S and REALFORCE R3, there is a certain amount of “clacking noise”, so we recommend the above for those who expect “super quietness”.

No keyboard backlight, etc.

Unfortunately, the As for keyboard backlighting, which is standard on MX series keyboards, the K855 does not have it.

This is unavoidable due to cost reduction.

Personally, I have no problem with this at all, as I do not see the need for backlighting, even on gaming keyboards.

cropped GreenKeys Fabicon 1

If I am typing in the dark, I use a neck light.

The main unit can be stored upright for a clean desk area.

Image capture: YouTube

Keyboards are often surprisingly difficult to “store”.

Especially in office work, the area of one’s desk is often limited, and there are many opportunities to move the keyboard out of the way when there is a lot of paperwork to be handled.

In such cases, K855 is also useful.

The K855 has a flat back and can be stored “standing” on its own.

This can be tucked upright by the monitor and will reduce clutter around the desk.

Bluetooth /Logi Bolt USB receiver supported as connection method

Image reference: Logitech

The K855’s connection to a computer is “wireless” only, no wired connection is available.

Two wireless connection methods are available: one using the Bluetooth function of the PC itself, and the other using Logitech’s proprietary Logi Bolt USB dongle, the Logi Bolt USB receiver.

Pairing with devices is possible with up to three devices simultaneously, and switching between devices can be easily performed by simultaneously pressing the “Fn key” and the switching button in the upper left corner of the keyboard.

Image reference: Logitech

The ability to switch between Mac and Windoe at the touch of a button will be very useful, as it can be used across operating systems.

Mac users also need to turn off the FileVault feature to avoid the problem of not being able to enter the password on the login screen.

Not only Logitech products, but also non-Apple third-party wireless keyboards must be unencrypted for the entire disk, called “FileVault,” when using non-Apple third-party wireless keyboards on a Mac with the built-in Bluetooth function.

Without unlocking it, you cannot use a third-party wireless keyboard to enter your password at the login screen.

  1. On a Mac, select Apple Menu > “System Preferences
  2. Click on “Security and Privacy” and then “FileVault
  3. If the lower left lock is locked, click to unlock the preferences panel.
  4. Click on “Turn off FileVault
  5. Click on “Turn off encryption

However, if you use the “Logi Bolt USB Receiver”, you can enter the password on the login screen even when FileVault is turned on.

Turn off FileVault encryption at your own risk.

cropped GreenKeys Fabicon 1

Kawamura, the manager, has a raft of BT-connected keyboards that do not support Logi Bolt, so FileVault is turned off.
If the keyboard can be used with a USB connection, such as the HHKB Professional Hybrid, there is a way to use a USB connection only when logging in, but since many keyboards are BT-only, it is unavoidable to turn off the connection.

Driving system is not rechargeable, but battery-powered.

Image reference: Logitech

Most models in Logitech’s top-of-the-line MX series of keyboards and mice use a “USB rechargeable” system.

The MX Master3s, MX ERGO, MX Keys, and MX MECHANICAL are of course “charged” via USB Type-C to the lithium battery inside the device.

On the other hand K855 uses a “battery-powered” system that runs on two AAA alkaline batteries. On the other hand, the K855 is battery-operated.

This is presumably to reduce costs, but more importantly, it is a benefit of not having to recharge the batteries. The batteries also do not need to be replaced frequently, as they are nominally rated to last up to 36 months.

Numeric keypad-less size prevents typing errors inherent in compact size

The K855, like all recent Logitech keyboards, has a top row “function key row” with function keys.

The Easy-Switch button for switching between paired devices, the pictogram function, and calling up the voice recognition function are all located to enhance the convenience of the media control buttons.

In addition, the Since the “directional keys” and “special keys” are arranged separately, which is a major feature of a tenkeyless keypad, the advantage of having far fewer wrong entries compared to MX MECHANICAL and Keychron K2/K3 will be very significant.

Because of this placement of the special keys in a single right column, there Possibility of very frequent and stressful typing errors due to frequent pressing of special keys when pressing the backspace key. There is a

In some cases, the directional keys are arranged in a single horizontal row, as on the Keychron K3, so that people accustomed to blind touch may not be able to press the keys at all.

With that said. The K855 is also tenkeyless in size, which means that the special keys and directional keys are independent, allowing for stress-free blind touch.

Citation; Logitech
cropped GreenKeys Fabicon 1

In MX MECHANICAL, the keycap on the right row has been removed.
K3 has been kept in storage because the directional keys are too specific.
After all, for compact size, I would prefer something without special keys itself like HHKB or MX Keys mini.

Logitech Signature K855 Keystroke Review

This is a keystroke review by the author using an actual device.

  • Photographed by Nikon D7500
  • Audio: SHURE Beta58 (off-mic)

Logitech Signature K855 actual device review


Let’s take a look at the details of the product using the actual device.


The key pitch is full-size (19 mm) and does not feel cramped in the hands at all.

Another great feature of the K855 would be that it can stand on its own in this way.


It is powered by dry cell batteries, not rechargeable batteries, and has a battery compartment on the back.

I’m a little concerned about the strength of the plastic on this lid….

Also, a storage box for the Logi Bolt USB receiver is provided next to the battery box, so there is no need to worry about losing the receiver when carrying it around. (Logi Bolt USB receiver is an accessory)


The keycap design features all keytops facing up, similar to the HHKB.

This is called “step sculpture.


The sinkage when striking keys is about 4.0 mm, which is sufficient for a comfortable press.

The axis is a red axis made by TTC.

K855 Sound Sample

I see that the keycap has a spherical design with a concave center.

The switch itself is quiet, but the sound of contact with the base (bottoming out) is slightly louder, which may be a concern when used in quiet offices.

The key layout is designed to be compatible with both Windows and Mac, as expected of Logitech.

I am very happy because the G913 had a Windows-only key layout.

The base has an aluminum top, which is very unlike the texture of keyboards available in the 10,000-yen range.

The tilt leg has two steps of 0° and 8°.

Logitech Signature K855 General Comments

Let us now summarize the advantages and disadvantages of K855 based on the explanations given so far.

Advantages and disadvantages of K855

Low price
Supports Bluetooth and USB wireless (Logi Bolt) connection methods
Excellent key feel
Can be stood up for easy storage space
Aluminum textured and beautiful
Compact with no numeric keypad
Loud (noisy) keystrokes
USB connection is not available
No backlight
Hot-swap not supported
The back cover is cheap and looks like it’s going to break.
No US sequence ( international models have it)

Advantages of K855

The benefits of K855 are as follows

  • Low price
  • Supports Bluetooth and USB wireless (Logi Bolt) connection methods
  • Excellent key feel
  • Can be stood up for easy storage space
  • Aluminum textured and beautiful
  • Compact with no numeric keypad

Overall, the product boasts outstanding quality for an easy-to-buy mechanical keyboard in the 10,000-yen range, making it a very good value.

Wired connection is not available, but wireless connection (USB wireless) with guaranteed security is available by using Logi Bolt.

It is tenkeyless, compact, and can be stored in an upright position for easy handling.

The Logi Bolt storage area is also built into the main body, and its light weight makes it easy to carry.

It is an excellent introduction to mechanical keyboards.

Disadvantages of K855

The disadvantages of K855 are as follows

  • Loud (noisy) keystrokes
  • USB connection is not available
  • No backlight
  • Hot-swap not supported
  • The back cover is cheap and looks like it’s going to break.
  • No US sequence (international models have it)

It should be noted that the “typing sound is noisy.

The volume is about “standard” for mechanical keyboards, and the red-axis keyboard is not particularly loud, but it is likely to be “noisy” for first-time mechanical keyboard users.

K855 Sound Sample

Use in a quiet office will probably be quite disturbing, so we recommend using the system in a workplace with some buzz.

Another point of concern is the cheapness of the back cover, which blocks the battery compartment and Logi Bolt receiver storage area.

IMG 20220807 095728 scaled

I feel that the plastic “deflection” like the lid of an alarm clock is used to open and close it, and therefore is more likely to be damaged by repeated use.

In addition, the fact that only JIS layout models are available is also a disadvantage.

Although the “K855 US array model” exists overseas, it may still be considered “unfashionable and unsaleable” in the Japanese market.

Logitech Signature K855 Keyboard Bluetooth Wireless Mechanical Keyboard 84 Keys with Logi Bolt Receiver Gaming Office.jpg Q90.jpg
Image credit: AliExpress

If you really want an 80% tenkeyless keyboard in white, consider REALFORCE.

Summary|K855 is recommended only for Mac users.


The above is an introduction to the Logitech Signature K855 from the perspective of a Mac user.

I know it is rare to find a Gen Xer who was forced to use the G913 with Karabiner-Elements, but I am not the only one who is very happy that Logitech brand has finally released a Mid Profile mechanical keyboard that can be used with Macs.

As an introduction to mechanical keyboards for Mac, the K855 is perfect. K855 is the perfect introduction to mechanical keyboards for the Mac.

One you can’t go wrong with!

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