This is a universal driver board for e-Paper raw panels, thanks to the dual wireless features - WiFi & Bluetooth - it is easy to display images from PC / smart phone via WiFi or Bluetooth. Onboard ESP32, supports for development. Provides Android APP, allows to refresh display content via Bluetooth Provides HTML host code, allows to refresh display content via remote webpage, suit for Internet applications Supports Floyd- dithering algorithm, more color combinations, better shadow rendering for the raw image Supports popular image formats: BMP, JPEG, GIF, PNG, etc. Easy to be integrated into wireless applications Comes with e-Paper driver (open source) Comes with development resources and manual WiFi protocol: 802.11b/g Bluetooth protocol: 4.2, includes traditional BR/, and low power BLE Interface: 3-wire SPI, 4-wire SPI (default) Operating voltage: 5V Operating current: 50mA ~ 150mA color:Blue Material:PCB size:29.46mm x 48.25mm Package Contents: 2 x e-Paper ESP32 Driver Board 2 x e-Paper Adapter 2 x 24PIN FFC Only the above package content, other products are not included. Note: Light reflection 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.