waveshare 3.7inch E-Paper E-Ink Display HAT Compatible with Raspberry Pi4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W 480×280 Pixels Black/White 4 Grey Scales SPI Interface Supports Partial Refresh

Specifications: Operating voltage: 3.3 V. GREY SCALE: 4 INTERFACE: 3-wire SPI, 4-wire SPI PARTIAL REFRESH TIME:0.3s Outline dimensions: 54.9 x 93.3 x 0.8 mm. FULL REFRESH TIME: 3s DISPLAY SIZE: 47.32 × 81.1 mm REFRESH POWER: 50mW (typ.) DOT PITCH: 4.3 × 0.18 mm. STANDBY CURRENT:<0.01uA (almost none) RESOLUTION: 480 × 280 pixels. Viewing angle: >170°. Display colour: black, white. E-Paper refreshing Refresh Mode Full refresh: e-paper flicker when full refreshing to remove ghost image for best display. Partial refresh: It don't flicker if you use partial refresh (only some of the two-color e-paper support partial refresh). Note that you cannot use Partial refresh all the time, you should full refresh e-paper regularly, otherwise, ghost problem will get worse even damage. Refresh rate When using, you should set the update interval at least 180s. (except Partial tolerable types) Please set the e-Paper to sleep mode or power off it directly, otherwise, the e-Paper is damaged because of working in high voltage for long time. Working place We recommend you to use the e-paper indoor. If you need to set the outdoor e-paper, please place the e-paper in shadow and protect it from UV. When you designed you e-paper product, you should take care about the working situation like temperature, humidity, etc. User Manual:https://www.waveshare.com/wiki/3.7inch_e-Paper_HAT?amazon

• Provide online user manual (examples for Raspberry Pi/Jetson Nano/Arduino/STM32), please check the manual carefully before using!
• No backlight, keeps displaying last content for a long time even when power down. Ultra low power consumption, basically power is only required for refreshing
• Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano
• Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards, Jetson Nano
• Onboard voltage translator, compatible with 3.3V / 5V MCUs