Quantity: 55(+/-2%) pieces / Pack Lens: 5mm Diameter / Round Emitting Color: Red Forward Voltage / Current: 1.9V-2.1V / 20mA Power:0.02W Polarity: Anode (Longer Part) | Cathode (Shorter Part) These light-emitting diodes work well for a wide variety of applications It is great for electronic and electrical experiments