No backlight, power can be a long time to maintain the display of the last screen Very low power consumption, basically only on refresh SPI control interface, can access for Raspberry Pi/Jetson Nano/Arduino/STM32 and other main control board Onboard level conversion chip, compatible with 3.3V and 5V microcontroller interface Provide complete information manual (for Raspberry Pi/Jetson Nano/Arduino/STM32 and other sample programs) Specification Working voltage: 3.3V/5V Communication interface: 3-wire SPI, 4-wire SPI Dimensions: 89.5x 38mm Display size: 66.89 x 29.05mm Resolution: 296 * 128pixels Display color: black and white Gray level: 2 Partial refresh: 0.3S Refresh power consumption: 26.4mW(typ.) Sleep current: Less than 0.01uA (close to 0) Viewing angle: Greater than 170° color: blue Material: Plastic+Metal Package Contents: 3 * Display 3 * 20cm Connection Cable