Working on an Arduino or electronics project that needs user input? This 4x4 matrix membrane keypad is perfect! It has 16 keys arranged in a grid, with a simple membrane design that's durable and affordable. Perfect for DIY projects like security systems, menu interfaces, data entry, or custom controllers. The keypad connects easily to Arduino boards with just a few wires – you'll find plenty of code examples online. Brand new, generic/unbranded but works great. Made in China. If you're building a homemade calculator, door lock, game controller, or any project that needs button input without using individual switches, this keypad saves space and wiring. The membrane design makes it thin and lightweight. No assembly required – ready to use right away. Don't waste time wiring up 16 separate buttons when this integrated keypad does the job. Perfect for students, hobbyists, makers, or anyone into electronics prototyping. Order one (or a few) for your next project and simplify your design. So many possibilities with this versatile input device!