Using this digital push button is a breeze. First, connect it to your device. Since it has a wide voltage range from 3.3V to 5V, it can work with many different power sources. Just plug the digital cable into the right place and it's ready to 'plug and play'. You'll notice the LED will give you an indication of its status.
When you press the button, you can take off the plastic cap for a more satisfying feel. The 'D' on the corner and the illustration on the back help you know exactly what it does. You can use it to create all sorts of interactive projects.
As for maintenance, keep it clean and dry. Avoid exposing it to extreme temperatures or moisture. If you're not using it for a long time, just store it in a safe place. That way, it'll keep working well for you for a long time.