The notebook has a screen-like LED array on which scrolling text can be projected. These can be any words or names that the user wants to see. The front cover of the notebook is a completely electronic board and had an array of 28 x 8 LEDs that form the screen. ARDUINO compatible: This is an electronic board based on easy-to-use hardware and software, it uses an 328p microcontroller and is compatible with the Arduino platform, making it a very easy system to use and program by USB connection like UNO board. (USB cable included) . It requires 3 coin cell batteries 1632 to operate. (batteries not included). 80 pages Premium paper. Size: 5in x 7in