Red Universal Anode 4-Segment LED Display Board TMI637 The module has a 12 Pin, and with a clock point four common anode tube (0.36 inches) of display module. Only need two signal lines can make the MCU control this model. Chip: TM1637 Operating voltage: 3.3V-5V Board size: 42 x24 x12 (mm) Reference: https://www.mcielectronics.cl/website_MCI/static/documents/Datasheet_TM1637.pdf CCS-3135 - We specialize in Electronics, Computer, Cell Phone, Camera, Professional Signal Conversion Devices, Adapter, Cables and other Accessories Pickup Location: "Cable Link" Tel: 613-680-6188