E290 (HT-VME290) is an E-Ink development kit with multiple wireless drive methods.This board is equipped with a default 2.90-inch black-white E-Ink display screen, continuous display for 180 days after power outage.It is compatible with for , PlatformIO, Micpython and other development frameworks, can be used to develop applications such as electronic tags and identity tags, it is also possible to run open source projects like Meshtastic.NOTE: You need to flash the meshtastic firmware yourself.ESP32-S3R8 MCU, support Wi-Fi and BLE.LoRa module compatible with Mashtastic.Low power consumption, 18uA in deep sleep, continuous display for 180 days after power outage.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).Onboard 2.90 inch 296 x 128 pixels display, support for partial refresh.Storage condition: -25 ~ 70, 45%RH.Optimal operating condition:0~50, 5510%RH.SH2.0-4P sensor interface is perfectly compatible with QuickLink series sensors.2 x 20 Pin Female Header, perfectly compatible with for .Compatible with for .Color: As shownMaterial: PCBSpecifications:433-510mhzDifferent batches may have different printing screens, but it does not affect the usePackage Contents:1 x Devboard1 set of accessories (accessory colors are random, Not accepting designation)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.