The integrated E-Ink display has a high resolution of 128x296 pixels, and can show system status and parameters, making it convenient for users to use the development board for their own product design. Vision Master E290 has a rich set of pins and hardware resources, which will allow you to expand widely. Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching). The integrated E-Ink display has a high resolution of 128x296 pixels, and can show system status and parameters, making it convenient for users to use the development board for their own product design. Compatible with Arduino, we provide development frameworks and libraries. Heltec Meshtastic ESP32 SX1262 LoRa Smart Price Tag E-Paper Monitor Development Board 2.90-inch Black White E-Ink Display Screen Bluebooth WiFi Compatible with Arduino (902-928MHz)