... V / DC ± 10%; current <100mA. 60 membrane keyboard switch, the feel good, high reliability, waterproof and ... dustproof features superior to a purely mechanical keyboard switch; key operation force of 60 ± 20cN ... , Win2000, WinXP operating system..Programming features All keys can be programmed, each key is programmable up ... X-, P, L stalls Z keys: Z, X, P, L, stalls X-keys: X, P, L stalls life ...