?Display performance?The 0.91 oled I2c display,Blue display color,the display performance is better than the traditional LCD display, also lower consumption?no backlight required, self-illumination. ?OLED Resolution? 128x32?3.3 ~ 4.2V power supply; Operating temperature: -40 ~ 80 ??Display controller: SSD1306, Signal interface: 4 wire SPI Pitch 4-pin?High Contrast Ratio (10,000:1) ?OLED Benefits? Compact design makes it easy to carry anywhere.Thinner & Lighter & Durable?Free Viewing Angle?Fast Response Time (?15?s). ?Applicable To? Such as industrial POS & Server?USB Key?Card Reader and Communication Router?Set-Top Box Mobile Phone?Most Products from Any Segment. ?Package Contents?3 x 0.91 inch OLED LCD Display Module White, Please check the product parameters carefully before purchase, and if you have any questions after purchase, please feel free to contact us.