|Keyswitches||Modified Cherry MX|
|Interface||Early versions: RS232 and LPT, later versions: AT and ADB, current version: USB.|
|Price||199 USD (current USB model)|
Early versions connected to a computer by a serial interface (RS232). Special software had to be run in order to use the keyboard. In 1994, the keyboard was fitted with both an AT and an ADB connector; no special drivers were necessary for it to operate. The current (as of Nov-2013) version of the BAT keyboard has an USB interface. All versions were/are available as a left-hand version and a right-hand version.
Characters are entered by pressing and releasing a combination of its seven keys: four finger keys and three thumb keys. Ordinary letters can be entered by combinations of the four finger keys and the central, grey thumb key. E.g. pressing those five keys at once and releasing them sends the character 'o'. The remaining two thumb buttons, red and blue colored, enable entering numbers, interpunction, function keys and modifiers like shift, alt and control. Usually, modifiers are entered using the sticky key principle: for instance, once the shift command is given (blue thumb key pressed and released), the next character will end up as the shifted version. The BAT keyboard can be configured by software. Additional chords as well as macros can be created .
Gallery of the AT/ADB model (left hand)
Comparing the springs of the BAT keyboard with that of other Cherry MX springs
The switches of the BAT keyboard require a lower actuation force than Cherry MX Red switches