The following models of the keyboard chip are not the same, the firmware is not universal, please do not brush the firmware at will, the keyboard to refresh the firmware please use the corresponding model of the firmware, thank you!
Brush the wrong firmware may lead to chip damage keyboard can not be used, so please pay attention to the firmware model when brushing firmware

(TK75 TK75HE TK75PRO TK75SE TK75V2)