Adafruit 1.2 4-Digit 7-Segment Display w/I2C Backpack - Yellow : ID 1269 : $17.50 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: LED 7 Segment Display, MODBUS-RTU Display Module, 4 Digits Display with RS485 Serial Port for PLC Communication (5-36V) : Industrial & Scientific
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