Energy-saving display: I2C OLED display has better performance and lower power consumption than traditional LCD display, IIC (I2C communication) simplifies the connection; please note that this I2COLED display module does not come with pin headers. More Details: Compatible use with Arduino, ESP8266, ESP32, STM32, etc. ; Power supply 3.35V; Working Temperature: -40 - 85; Resolution: 128x32 Good Compatibility: This i2c oled display module is compatible with Raspberry Pi 4B/3B+/3B/2B/Zero, Arduino and ESP8266, ESP32, STM32, etc. What you get: 5 OLED display modules, classic display colors, self-illuminating, no backlight With innovative OLED technology, the 0.91-inch screen has a high contrast ratio. In addition, the screen performs better than conventional LCD screens and consumes less power because the pixels emit their own light and do not require a backlight.