4 x 4 Matrix Array Module 16 Key Button Switch Keypad 4x4 Arduino Raspberry PI
4 x 4 Matrix Array 16 Key Botton Switch Keypad Keyboard 4x4 Arduino Raspberry PI. 2.54 mm spacing header for Arduino and other projects. 4 x 4 Matrix Array 16 Key Push Botton/Micro-switch Type Keyboard.