Ortek, Keyboard, models:

PKA-1720A	User Manual
PKB-1700	User Manual
PKB-1720	User Manual
PKB-1720BT	User Manual
PKB-1760	User Manual
PKB-1800	User Manual
Slim Multimedia Pro Keyboard	User Manual
UKB-2030	User Manual
WKB-1500	User Manual
WKB-1600	User Manual
WKB-2000	User Manual
WKB-2300	User Manual
WKB-2360	User Manual
WKB-2380	User Manual
WKB2100	User Manual