Contains 10 Clear Reds, 10 Clear Yellows, 10 Clear Greens, 10 Clear Blues, 10 Clear Whites and 10 Clear Pinks. These light-emitting diodes work well for a wide variety of applications including Arduino projects. Comes with some resistors for connection. Forward Voltages are Clear Red and Clear Yellow 1.9-2.0V, Clear Green: 2.9-3.1V, Clear Blue, Clear White and Clear Pink: 3.0-3.2V. Packaged in a resealable zip lock bag for your ease of use.