No backlight, maintains display of the last screen without power for extended periods Very low power consumption, draws power only during screen refresh SPI control interface, compatible with Arduino Nano, STM32, and other microcontroller boards Onboard level conversion chip, supports both 3.3V and 5V logic levels Includes comprehensive user manual with sample code for Arduino Nano, STM32, and other platforms Specifications Operating voltage: 3.3V / 5V Communication interface: 3-wire SPI, 4-wire SPI Dimensions: 89.5 x 38mm Display area: 66.89 x 29.05mm Resolution: 296 x 128 pixels Display color: Black and white Gray levels: 2 Partial refresh time: 0.3s Typical refresh power consumption: 26.4mW Sleep current: Less than 0.01μA (nearly zero) Viewing angle: 170° Housing color: Blue Material: Plastic and metal Package includes 1 x Display module 1 x 20cm connection cable Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting conditions and screen settings may cause slight variations between the product image and actual color. Measurement tolerance: ±1–3cm.