The 4x4 keypad module is a very useful product that can be easily used and controlled with many microcontrollers, especially Arduino. There is a keypad in the matrix array in the form of 4x4 on the card. It can be used by providing a connection between the male headers on the card and the microcontroller.
You can order the 4x4 Green Keypad-Keypad from the Button and Switch category with the advantage of affordable price, same day shipping and fast delivery from SAMM Market.