3 x 4 Membrane Matrix Keyboard for Arduino Enter simple numeric inputs to your microcontroller project with the Velleman VMA300: 3×4 Matrix Keypad. The VMA300 is made of a flexible membrane and can be mounted anywhere using its adhesive back.Compatible with Arduino UNO and MEGA. Specifications:

• Microcontroller Pin Connections 3 columns by 4 rows
• 7pin connection
• Cable Length 3.54 in. (9 cm)
• Weight 6.25 g
• Dimensions 7 cm x 7.7 cm x 0.1 cm
• Arduino Library keypad.h