Kingbright L-934SRC-J4, 640 nm Red LED, 3mm (T-1) Round Through Hole package. Forward Voltage: 2.1 V. Luminous Intensity: 4.5 cd. Number of Pins: 2. Viewing Angle: 34 °. Dimensions: 3 x 4.6mm. Lens Colour: Clear. LED Material: AlInGaP.