Adafruit 0.56 4-Digit 7-Segment Display w/I2C Backpack - Yellow : ID 879 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
4-DIGIT DISPLAY WITH DRIVER MODULE (TM1637 DRIVER) - Whadda
0.56" Red Led 4-digit Display Module 7 Segment 4 Bits Digital Tube Led Display With Clock Point For Arduino - Industrial Computer & Accessories - AliExpress
0.36" Inch 4-digit Display Module Red Clock Point 7 Segment 4 Bits Digital Tube Tm1637 Led Display Module For Arduino - Industrial Computer & Accessories - AliExpress
MAX7219 0.56" 3 or 4-Digit 7-Segment Display Board - ProtoSupplies
In-Depth: Interfacing TM1637 4-Digit 7-Segment Display with Arduino
TM1637 0.56" LED Display 7-Segment 4-Digit Clock Module Digital Tube – diymore