1 2 3 4 Key Button Membrane Switch Matrix Array Keyboard Keypad Control Panel Pad DIY Kit For Arduino
1 key button switch $10
2 key button switch $13
3 key button switch $15
4 key button switch $18
Specification:
Button key Life: >50,000 orders
Electric circuit material: 0.125mm fully transparent
Connector: 2.54mm Adapter
Circuit resistance: <50Ω