Arduino 3×4 Keypad 4×3 Matrix 12 Keys Membrane Switch Keypad
Ultra-thin design & adhesive backing provides easy integration to any project
Excellent price-performance ratio
Easy communication with any microcontroller
5 pins 2.54mm pitch connector, 4×3 type 12 keys.
Sticker can peel off for adhesive mounting.
Used widely in industrial and home electronic equipment's, instrument, etc.
This allows a microcontroller to ‘scan’ the 7 output pins to see which of the 12 buttons is being pressed.