Pack of 5 4x3 Matrix 12Key Membrane Keypad Modules compatible with Arduino and other microcontrollers Product highlights Ready for prototyping and small projects: five identical 12key keypads in a compact 4 by 3 layout for numeric input and simple command entry. Simple matrix interface: designed as a 4 by 3 switch matrix for easy scanning by microcontrollers, minimizing required I O lines. Low profile membrane design: flexible, space saving construction that mounts easily on panels or enclosures and tolerates repeated use. Easy to wire: compatible with common microcontroller platforms and typical keypad scanning libraries for straightforward integration. Durable, lightweight materials: membrane surface and embedded switch contacts provide responsive input while keeping overall weight and thickness low. Key benefits and why you need this Saves development time: plug into your breadboard or wiring harness and start scanning keys with standard code examples. Expands input options without extra hardware: the matrix layout allows multiple keys to be read using a small number of digital pins. Cost effective for multimodule projects: five modules let you prototype multiple designs, worn panels, or add keypads to several devices at once. Space efficient and professional looking: low profile membrane fit keeps user interfaces slim while providing clear tactile feedback. Important attributes Function: 12 independent momentary switches arranged in a 4 by 3 matrix suitable for numeric entry, menus, and control commands. Compatibility: works with Arduino boards and other microcontrollers that support keypad scanning routines. Size and form factor: compact membrane keypad suitable for panel mounting or surface attachment in small enclosures. Material and performance: flexible membrane construction with embedded switch contacts for reliable, repeatable key activation. Practical applications DIY control panel: add numeric input and mode selection to a home automation controller or sensor hub. Prototype user interface: use for menu navigation and parameter entry on development boards and standalone projects. Access and security projects: implement simple PIN entry or device unlocking for hobby security panels and access prototypes. What you get Five 12key membrane keypad modules, ready to wire into your project and scan using standard code libraries. This pack provides a practical, compact solution for adding reliable keypad input to microcontroller projects without complex wiring or extra hardware.