This is a big 4x 1.2 inch 7-segment LED display module that can display standard 4 digit in format of clock / temperature. LED control is done over I2C using the HT16K33 interface.

Change the I2C address from a backside W0, W1 or W2 solder jumper. Jumper is shorted with solder, that sets the address. W0 sets the lowest bit with a value of 1, W1 sets the middle bit with a value of 2 and W2 sets the high bit with a value of 4. The final address is 0x70 + W2 + W1 + W0. For example, if W2 is shorted and A0 is shorted, the address is 0x70 + 4 + 1 = 0x75. If only W1 is shorted, the address is 0x70 + 2 = 0x72

Feature:

• RED: DC 5v but 3v will work and LED will be dimmer
• Bright GREEN: DC 9v
  
• Standard 4 digit Clock / Temperature format
  
• 1.2” 4-Digit 7 segment LED
• 16-Step Software Dimming control   
• I2C address selectable 0x70(default all-open) to 0x77
  
• Dedicated pin for I2C bus pull high Vcc