100 purple super bright LEDs, colloid color: transparent, luminous color: purple Parameters: 3V-3.2V Current: 20mA. Wavelength: 365nm-400nm. Tube diameter: 3mm round, 2 lead wires. Polarity: anode (longer part)/cathode (shorter part). Packing: 100 LED diodes are packed in a visible sealed bag, which is easy to store and not easy to damage, and comes with a clear specification label for you to confirm the model. Applications: LED DIY projects, Arduino DIY, scientific experiments, breadboards, indicator lights, maintenance LEDs, etc. This LED diode can be applied to various electronic experiments including Arduino projects