Color Others Brand N/A Model N/A Quantity 1 Set Material FR4 English Manual / Spec No Other Features Four digital display module 8550 three-pronged drive; Module interface description: 1. VCC external 3.3V-5V voltage (can be directly connected to 5v and 3.3v MCU); 2. ABCDEFGH segment drive connected directly to the microcontroller IO port; 3. Drive D1 D2 D3 D4 connected directly to the microcontroller IO port 4. has a fixed bolt holes for easy installation. Note: The modules can be directly connected with the microcontroller IO port (requires 12 IO ports) to achieve the purpose of controlling four digital display without any other drivers and buffers. Packing List 1 x Module