The 4x4 Keypad Matrix (Green Button) is a reliable input module designed for smooth operation in embedded systems, security locks, and robotics projects. Featuring 16 tactile green keys, this keypad is compatible with Arduino, Raspberry Pi, PIC, and other microcontrollers, making it highly versatile for students, makers, and professionals in Bangladesh. Known for its sturdy build and accurate key response, it’s widely used in automation systems, digital safes, and custom DIY electronics. The bright green buttons not only add functional clarity but also enhance the visual appeal of your project.