This is a Black Electronic Building Blocks Big Key button module. Big Keyboard module allows you to use an analogue port to read the key states with sensor expansion board can be done using multiple buttons. And High-quality button, Port compatible sensor extension board when pressed output low level, release to maintain a high level.

Features: 

1. This button module kit includes 1PCS of button modules with Black caps.
2. When you press the button, it will output a high level and it will turn to be LOW when you release it.
3. Great for Children and Visual programming aids.

Package Includes:

1 x Black Key Button Module High-Level Output