SHOKITECH 4×5 Matrix Array 20 Key Membrane Switch Keypad Keyboard For Arduino Electronic Components Electronic Hobby Kit

"This 4×5 Matrix Array 20 Key Membrane Switch Keypad Keyboard is a high-quality soft-touch feeling button keypad with 100 million life-stroke lifespans and good resistance to environmental conditions. This DC 12V 4×5 Key Matrix Membrane Switch Keypad is a high-quality product at a very low cost for your application needs. This 20-button keypad provides a useful human interface component for microcontroller projects. Convenient adhesive backing provides a simple way to mount the keypad in a variety of applications. The Keypad 4×5 features a total of 20 buttons in Matrix form. This is a membrane keypad with no moving parts. A female 9-pin berg connector is required for interfacing it with your microcontroller circuits."