KEYBOARD INTERFACE : USB 2.0 NORMAL KEYS : 104 / 105 / 108 keys (different by languages) MODEL NAME : VIGOR GK20 GAMING KEYBOARD MAIN KEY SWITCHES : Membrane USB CABLE : 1.8m with gold-plated connector WEIGHT (PRODUCT / PACKAGE) : 866.5 g / 1257 g DIMENSIONS(MM) : 455.2 x 171.3 x 34.3 mm OS SUPPORTED : Windows 10 / 8.1 / 8 / 7 KEYSTROKE LIFE : 12+ Million