PRODUCT FEATURES & SPECIFICATIONS * Double injection keys with 8 different effects * Multimedia functions through FN combination keys * Rated 50 millions Blue switch * Anti ware-off keycaps * Keys Layout: 104 keys US LAYOUT * 28 Keys Anti-ghosting * Keyboard size: 43,7 X 12,6 X 3,9 cm * Weight: 1000g+_10g .