This is a universal driver board for e-Paper raw panels, thanks to the WiFi connectivity, it is allowed to display images from PC / smart phone via WiFi conveniently. Furthermore, it can also be used for development, just like any other normal board. Onboard ESP8266, supports development Provides HTML host code, allows to refresh display content via remote webpage, suit for Internet applications Supports Floyd-Steinberg dithering algorithm, more color combinations, better shadow rendering for the image. Supports popular image formats: BMP, JPEG, GIF, PNG, etc. WiFi protocol: 802.11b/g/n Interface: 3-wire SPI, 4-wire SPI (default) Operating voltage: 5V Operating current: 50mA ~ 100mA Outline dimension: 29.57mm x 48.26mm Mounting holes size: 2.9mm Colour:blue Material:PCB Package Contents: 1 x e-Paper ESP8266 Driver Board Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.