Using these LEDs is easy. First, you've got a pack of 10 diffused rectangular 5mm RGB LEDs. Since they're Common - Anode type, connect one pin to about 5V. Then, take the other three legs and connect them to the ground through a resistor. These LEDs are great for making colorful indicators or just having fun with color - swirling. When you're working on an electronics project, remember that if you need help, our 'Introduction to using LEDs' tutorial is there for you. As for maintenance, keep them away from extreme temperatures and moisture. If you handle them gently, they'll last a long time and keep lighting up your projects with beautiful colors.