4x4/3x4 Matrix Array 16/12 Keys Switch Keypad Keyboard Module for Arduino C412

Design: 3x4 matrix( 0-9, , # ). 1 X Matrix Keyboard. 4x4 matrix( 0-9, A-D, , # ). 12/16 buttons matrix. Main color: Black. Fit for professional prototype, hobby or university electronics projects.

eBay