patible with Win95/98/NT/ME/2000/XP 2.Direct access to internet and multimedia function with no driver required for Win ME/2000/XP 3.Switch Travel Distance:4.0 +/- 0.4mm 4.Peak Force:55 +/- 5g 5.Life Cycle:10,000,000 times 6.Operating Temperature(℃):0~+50 7.Operating Humidity:20%~90%RH 8.Power Supply:+5VDC ≤ 200mA 9.Multimedia hot key : 15keys 10.Dimension:?78(L)*210(H)*24(H)mm