Features: The 4x4Matrix Keypad Module feature 16 tactile micros switcher button and 8pin interfaces, design for seamlessly integration for Raspberry project requiring precise input control. compactly design with a 4x4matrix layout optimizes signal scanning efficiency, while durability micros switches ensures reliable, long last performances in high frequency usage scenario. Ideal for electronics hobbyists, robotics developers, and STEM educators seekings expandable input solution for prototyping customs controllers, devices, or interactively installations. Deploys in access control systems, calculator interfaces, industrial automation panel, or DIY gaming peripherals where space efficient tactile input is critical. Pre wire 8pin header simplifies circuit connection, while open source library compatibility accelerates coding workflows for Raspberry integrations. Specifications: Component:Plastic Size:Approx.43.5x39mm/1.71x1.54inch plugs Type: 8Pin Number of key:16 Option Type:2pcs,5pcs; for Raspberry ; Package Includes: Package A 2pcs 4x4Matrix Keyboard Module Package B 5pcs 4x4Matrix Keyboard Module note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.