Features 1、Can be directly connected with STC and other microcontrollers. 2、Only need to occupy three IO ports of the microcontroller to drive. 3、Scan display and button scan do not require MCU intervention, only need to read and write related registers. Send display data or test button to save MCU resources. 4、The button sensitive display works well. 5、8-bit digital tube, common cathode LED digital tube. Specification Features: Can be directly connected with STC and other microcontrollers. Only need to occupy three IO ports of the microcontroller to drive. Scan display and button scan do not require MCU intervention, only need to read and write related registers. Send display data or test button to save MCU resources. The button sensitive display works well. 8-bit digital tube, common cathode LED digital tube. Specification: 8 buttons 8 LEDs 8-digit digital tube, common cathode LED digital tube. VCC GND is connected to 5V power supply, STB CLK DIO is connected to IO port of MCU. Size: Approx. 7.5 * 5 * 0.8 cm / 2.95 * 1.97 * 0.31 in Package Weight: 25.3 g / 0.89 oz Package list: 1 * Key Digital Tube LED Display Module Package List