The 4x4 Keypad Matrix (White Button) is a versatile input solution designed for Arduino, Raspberry Pi, PIC, and other microcontroller-based projects. With its 16 responsive white keys, it offers clear visibility and a professional look, making it suitable for digital locks, automation panels, robotics control, and academic experiments. Easy to interface and highly durable, this keypad ensures consistent performance for both beginners and advanced users in Bangladesh. Its simple design and universal compatibility make it a trusted choice for DIY electronics and embedded system applications.