1.Keynumbers:?04/105/106/107/109/US/UK/KR/BR/JP 2.Dimension:?452(L)*163(H)*22(H)mm 3.Switch Travel Distance:?3.5?.4mm 4.Peak Force:?45?g 5.Life Cycle:??0,000,000times 6.Available Port:?PS/2,AT and USB