Using this membrane LED keypad is a breeze. First, remove the paper cover on the back to expose the adhesive backing, and then stick it to the desired location. To connect it, use the provided 3 - pin extra - long header strip to plug it into a breadboard. For projects where you need feedback, the red LED will light up to show an action is happening or the power is on. When handling the keypad, be gentle as it's made of soft plastic. If you want to attach it to a fabric, you can sew it with a needle and thread. To keep it in good condition, avoid getting it wet and store it in a dry place. Also, don't pull the flex cable too hard to prevent damage.