The AZDelivery E-paper screen module works via the SPI interface and can also communicate with MCUS with a voltage breakdown of 3.3V or 5V. The E INK display consumes very little electricity, so you only need the electricity if you update it. Details: Deport of: black, white, red Gray level: 2 Partly refresher time: 0.3s Full refresher time: 2s Refreshing performance: 26.4mW (type.) Standby performance: ＜ 0.017mw Consideration angle: ＞ 170 ° Specifications: Operating voltage 3.3V/5V interface 3-wire spi, 4-wire spi Dimensions 89.5 mm × 38 mm Display size 66.89 mm × 29.05 mm Point distance 0,138 × 0,138 resolution 296 × 128 Operating environment You can work with our product in the temperature range from 0 to around 50 ° C. The air humidity should be between about 35% and 65% RH. 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