Specifications:
Product Name :3X4 Matrix Keypad Module.
Keypad Number: 12.
Size: 50x70mm/1.96x2.75Inches.
Package: 1 PC.
This is 3x4 12 button matrix keypad module.The buttons are denoted by numbers and letters, 0,1, 2, 3, 4, 5, 6, 7, 8, 9, *, #, which can be used easily for many of your Arduino project.