Pack of five 4x4 matrix keypad modules, each with 16 pushbutton keys and an 8pin interface. Breadboardcompatible design makes these modules easy to integrate into microcontroller prototypes and DIY kits. Ideal for input control where multiple buttons are needed while minimizing wiring. Key benefits Compact 4x4 matrix layout provides 16 buttons while using only 8 microcontroller pins, conserving IO resources. Breadboardready module with standard 8pin header simplifies wiring and rapid prototyping. Direct compatibility with common microcontroller platforms such as Arduino and other MCU development boards, and with standard keypad scanning libraries. Consistent button layout and clear matrix wiring make it straightforward to implement menus, numeric entry, or control panels in projects. Supplied in a set of five modules for building multiple prototypes or for classroom and workshop use. Main features and attributes Configuration: 4x4 matrix, 16 keys per module. Interface: 8pin connection for rows and columns. Intended use: keypad input module for MCU and DIY electronics projects. Form factor: breadboard module designed for easy insertion into standard prototyping boards. Function: tactile pushbutton inputs arranged in a matrix for scanning by microcontrollers. How it solves common problems Reduces wiring complexity by organizing 16 buttons into a matrix that requires only 8 lines, simplifying both hardware and code. Speeds development time with plugandplay breadboard compatibility and a standard interface supported by many example libraries and tutorials. Provides a repeatable, compact input solution for projects that need multiple discrete keys without custom PCB design. Typical applications Prototype control panels and user interfaces for microcontroller projects, including menu navigation and mode selection. Numeric input and PIN entry for hobbyist lock or access prototypes, calculators, or data entry terminals. Educational kits and maker workshops where multiple identical keypads are needed for student projects and testing. What you get Five identical 4x4 matrix keypad modules, each with 16 buttons and an 8pin interface for easy connection to prototyping boards and MCU platforms. Notes for integration Use a keypad scanning routine or library on your microcontroller to read rows and columns. Confirm pin mapping on the module to match your code and wiring. Suitable for rapid prototyping and hobbyist applications; include proper debouncing in software for reliable key detection.