M5Stack Unit OLED is a 1.3-inch OLED expansion screen unit with 128 x 64 resolution that adopts the SH1107 drive scheme. This OLED screen is integrated with a magnetic design on the back that allows it to be fixed on the metal surface by adsorption. The unit OLED has I2C communication interface and full viewing angle. This OLED screen is ideally used for information display.