Plastic keyboard 4×4

This is a Matrix 4 x 4 Switch Keypad Module Board compatible with Arduino, and other microcontroller, Punch in your numbers/characters into this numeric matrix keypad. This keypad has 16 buttons, arranged in a telephone-line 4×4 grid, The keys are connected into a matrix so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad.

This keypad has 16 buttons, arranged in a telephone-line 4×4 grid.