This is 20×4 Character LCD Display with Yellow/Green Backlight ASCII Alphanumeric Character. 20×4 character LCD Display can be Interface with almost All Digital Microcontroller such as Arduino, 8051, PIC, AVR, ARM, MSP, COP8, STM, Raspberry Pi etc.4x20 Display also used in Industrial Research and Development R&D, Student Hobby DIY Project. About 20×4 Character LCD Display: 20×4 LCD is a basic 20 character by 4 line display Green/Yellow Back light. Utilizes the extremely common AIP31066 interface chipset. You will need 7 general I/O pins (If use in 4-bit Mode) to interface to this LCD screen. Includes LED Backlight. https://www.campuscomponent.com/products/20x4-s-lcd-yellow-green-backlight/2208614000001842609