CELERITAS II firmware update


CELERITAS II enables large volume and rapid key control when connected through a PS/2 port. Lately, we’ve received feedback from StarCraft II and Kart Rider gamers that RTR occasionally malfunctions when RTR is activated through PS/2 connection.


For gamers that are using RTR control with PS/2 connection and your keyboard has the serial number of the following, please download the latest firmware to solve this issue. 


*Serial numbers that are not included in the above have the latest F/W updated.


To update the F/W, please connect your CELERITAS II through USB since update is only possible at USB connection and not PS/2.


-          Activate XXX

-          Press Start

-          Check if “Data Varify OK!!” shows on your display and upgrade is complete.


To download the F/W:


104、105 Key for US, TC, THI, RU, NOD, FR, DE, UK, ES, PT:



106 Key for KR:



106 Key for BR:



108 Key for JP:




ZOWIE apologizes for all inconveniences occurred related to this malfunction. Your continuous feedback makes it possible for us at ZOWIE to understand the usage problems and provide in-time solution.


If you have problems or questions related to the F/W update, please contact local ZOWIE fan page for real-time customer care.