Dffused 5mm tri-color LEDs with separate red, green and blue LED chips inside! Ultra bright indicator or illuminator, and fun to color-swirl. 90 degree viewing angle. You can plug these into a breadboard diagonally.These are Common-Anode type which means you connect one pin to 5V or so and then tie the other three legs to ground through a resistor. We carry and use CA more than CC because multi-LED driver chips (such as the TLC5940/TLC5941) are often designed exclusively for CA and can't be used with Common-Cathode.Each order comes with 10 LEDs.