Perixx 10917 PERIBOARD-315 H US, Keyboard with Touchpad, Wired USB Interface with 2xUSB Hubs, Blue Backlit Feature, 14.57x5.43x0.91 Dimension 14.57x5.43x0.91 Inch Dimension (370x138x23mm) 6 Ft (1.8m) USB Cable with 2 extra USB Hubs Fit with 19" Rack Drawer & Kiosk Application (Compatible with Cherry G84-4400 Design) Blue Backlit Feature with 4 Level Brightness Adjustment If your alphabet typing appear with numbers (like J,K,L,etc), you may press Fn + Num Lock two keys together to enable or disable the number lock function