FN WIN locks the keyboard, and the keyboard has no reaction when it is locked.
The FN TAB switches the keyboard's wired and wireless mode; If the cable can not be used, pay attention to whether it is cut to the wireless state;
FN CTRL (left of the space) is locked FN, that is, switch to the F zone, the light can be adjusted directly, the number is f1 f2 f3... , backspace change del, return to normal and then switch;
fn backspace means delete
fn alt (left of the space) is to restore factory Settings (operation mode is: note that the cable is removed, the back switch is turned on, press about 5S)
FN \/- is adjustable backlight and switch;
Bluetooth pairing to switch to wireless mode fn tab, then fn p, caps flashing indicates pairing.