Typematrix 2030 USB Ez Reach US Ergo Keyboard Qwerty Ergonomic Matrix Key layout includig central backspace and enter keys USB 2.0 connector with 5.5 feet cable 3mm key travel with 55g 10g key force, membrane key technology with "double-scissor" mechanism Standard 19mm center-to-center key spacing with 10 million stroke lifecycle LEDs for NumLock, Caps Lock, Scroll Lock and Dvorak Mode