25 Jul 2PCS 4 x 4 Matrix Array 16 Keys 4*4 Switch Keypad Keyboard Module for
2pcs 4x4 Matrix Array 16 Keys Switch Keypad Keyboard Module for MCU 4 4 USA. 16 buttons matrix. Design: 4x4 matrix(0-9, , #, A,B,C,D ). Main color: Black. Fit for professional prototype, hobby or university electronics projects....