Specifications of  4×3 Matrix Keypad -12 Keys:-

• Length of cable + connector: 93mm
• 7-pin 0.1″ pitch connector
• Weight: 7.5 grams
• Keypad dimensions: 68.5mm x 76.5mm x 1mm

4×3 Matrix Membrane Keypad Features:-

• Ultra-thin design & adhesive backing provides easy integration to any project
• Excellent price-performance ratio
• Easy communication with any microcontroller
• Sticker can peel off for adhesive mounting.
• Used widely in industrial and home electronic equipments, instrument, etc.
• This allows a microcontroller to ‘scan’ the 7 output pins to see which of the 12 buttons is being pressed