Oled 1.3 inch is a monochrome graphic display module with a built-in 1.3 inch, 128x64 high-resolution display. oled 1.3 inch is able to work despite the absence of backlight. in a dark environment, contrast of oled display is higher than lcd display. this device is i^2c or spi compatible. due to its capability in displaying, it is often used in various application for instances, smart watch, mp3, function cellphone, portable health device and many others.