Matrix Keyboard Module 4×4

From the shop's description

Matrix Array Keyboard is a 4×4 key module with a contact resistance of less than 100 ohms, making it pleasant and soft to the touch. Thanks to its small size and compact design, this handy module with 16 switches is an ideal choice for applications such as: Alarm / security equipment, access control, device control. 4×4 matrix array keypad with 16 switches enables easy communication and scanning across the pad with only 8 microcontroller pins. This module is compatible with microcontrollers such as AVR and PIC, which makes it a perfect choice for your applications and projects. Size 68.5×65.5x10mm Features: – 12 Button Matrix 0-9 # * – Easy communication with any microcontroller