Product Name:  led dome membrane keyboard

Mechanical
Life expectancy: 1,000,000 actuations per switch position
Actuation force: 6-24 ounces (170-680g), range depending on customer's specification.
Switch travel: .005" to .030" (0.1-0.8mm) typical.
Overall thickness: .020" to .050" (0.5-1.3mm) typical.

Electrical
Operating voltage: 0-35V DC
Operating current: 100mA max
Operating contact resistance: less than 100 ohms typical.
Contact bounce: less than 5 milliseconds typical.
Conductors: printed silver conductive inks or carbon blend.
RFI and ESD shielding: available in most configurations.

with advantages of high reliability, low cost, small size, beautiful appearance, convenient assembly,  light weight, good waterproof/fire/oil resistance,  low power consumption, fast samples , stable quality, almost zero products return rate(0.2%), etc.