Features 1、This is a 0.36 inches 4-digit common anode red display module with TM1637 driver chip 2、It just need 2 signal wire to be controlled by single-chip microcomputer 3、Digital tube has 8 adjustable grey levels 4、The voltage of control interface can be 5V or 3.3V 5、Designed with 4 mounting holes, it is convenient to install Specification Features: This is a 0.36 inches 4-digit common anode red display module with TM1637 driver chip. It just need 2 signal wire to be controlled by single-chip microcomputer. Digital tube has 8 adjustable grey levels. Designed with 4 mounting holes, it is convenient to install. Specifications: Voltage: 3.3V~5.5V (5V is recommended) Current: 30A~80A Size: 47 x 24 x 12mm / 1.85 x 0.94 x 0.47" GND: Ground VCC: Power supply DIO: Data input/output CLK: Clock signal Package Includes: 1 x Display Module Package List