Quantity: 200 pieces / PackLens: 3mm Diameter / RoundEmitting Color: Colorful Slow FlashingViewing Angle: 120 DegreeForward Voltage / Current: 3V-3.4VPolarity: Anode (Longer Part) | Cathode (Shorter Part)These light-emitting diodes work well for a wide variety of applicationsIt is great for electronic and electrical experiments