4x4 Matrix 16 Key Buttons Keypad Keyboard Module 8 Pin Board For ArduinoFeature:1. 4x4 matrix Keyboard Module with 16 buttons2. Small size、 save more space3. More convenient to use4. Expanded development application modules and board accessories for singlechip5. With 16 keys and 8 pin6. Board size: Approx. 48 x 32mm \/ 1.88 x 1.26 inchPackage includes:1 x 16 Keys Keyboard Module