microtivity IS413 7-segment LED Display, 4 Digit Red Dynamic Common Cathode (Pack of 2) 2x 0.56-inch 7-segment LEDs 4 Digits, Dynamic, Red, Common Cathode Forward Voltage: 1.8V 12 pins. Pitch: standard 0.1" (2.54mm). Please refer to product image for the connection diagram. Instructions included in product packaging.