... mm,; Voltage +5 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; button to the ... key switch in the plate is 1.5 mm thick iron plate and rigidity; digital area keycap two-color injection molding ...