Editing HHKB Professional (section)

==HHKB Professional BT==
The HHKB Professional BT uses Bluetooth 3.0, but can also be connected with USB (Micro-B port under a hatch).
It comes in classic printed, classic blank and JP layouts in white/grey and charcoal gray.
There are no sound-damped (Type-S) versions. The "JP" moniker has been dropped for Japanese layouts.

The case design has been updated with thinner case top, slightly rounder edges and modified slope of front and back sides. Two AA batteries are hosted in a cylindrical bump at the back. 
The logo on the JP versions has been moved from the front to the top, but keyboards with the classic layout has the logo below the right Shift as usual.
There is also an indicator LED for pairing and connection.
Alkaline batteries are estimated to last three months.<ref name="picworldbt">
Pic World—[https://picworld.jp/2016/05/06/hhkb-professional-bt-%E3%83%8F%E3%83%83%E3%83%94%E3%83%BC%E3%83%8F%E3%83%83%E3%82%AD%E3%83%B3%E3%82%B0%E3%82%AD%E3%83%BC%E3%83%9C%E3%83%BC%E3%83%89%E3%81%AB-bluetooth-%E5%AF%BE%E5%BF%9C%E3%83%A2/ HHKB Professional BT – ハッピーハッキングキーボードに Bluetooth 対応モデルが追加されました]. Dated 2016-05-06. Retrieved 2019-12-12</ref>

==HHKB Professional Classic series<ref name="hhkbcomclassic">Happy Hacking Keyboard web site—[https://happyhackingkb.com/jp/products/classic/ HHKB Professional
Classic]. Retrieved 2019-12-10</ref>==
The keyboard now has a detachable USB Type C connector and a slightly updated case design, obviously based on the HHKB Professional BT, except that there is no battery bump and it has a Type C connector (without a covering hatch). There is no USB hub.
The logo has been moved to the top, and there is an indicator LED for Caps Lock. (instead of Bluetooth or battery status, because it has none of these)

Four variants with printed/blank legends in white/charcoal grey became available in 2019-12-10 for order on PFU Direct only. 
There are no sound-damped (Type-S) versions.