3mm discrete LED in blue color, 100 PCs / Package, works fine on Rainbowduino extension shield. Specifications Maximum Forward Current: 30mA Maximum Reverse Voltage: 6V Forward Voltage: 1.9V~2.6V (IF=20mA) Reverse Current: 5uA Luminous Intensity: 30~50mcd (IF=20mA) Viewing Angel: 30deg Wavelength: 568~573nm Working Temperature: -55~+100°C Storage Temperature: -55~+100°C Soldering Temperature: 260°C for 5 seconds