Vision Master E213 is an E-Ink development kit with multiple wireless drive methods. Collaborate with the sample programs and development tools we provide, users can operate the display via Bluetooth, Wi-Fi and LoRa. This board is equipped with a default 2.13-inch black and white E-Ink display screen, continuous display for 180 days after power outage. It is compatible with Arduino, 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. Main Features: ESP32-S3FN8 MCU, support Wi-Fi and BLE. Low power consumption, 20uA 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 2.13 inch 250 x 122 pixels display, support for partial refresh. Storage condition: -25 ~ 70℃, ≤45%RH. Optimal operating condition:0~50℃, 55±10%RH. 2*SH2.0-4P sensor interface is perfectly compatible with QuickLink series sensors. Compatible with for Arduino, we provide development frameworks and libraries. (Due to different product batches, the appearance may vary, which does not affect the use) Material: Plastic+PC colour: As shown<br><br>Specification: D Package Contents: 1 x 2.13 Inch E-Ink Display(863-870MHz)<br><br>Specification: B Package Contents: 1 x 2.13 Inch E-Ink Display(433MHz)<br><br>Specification: A Package Contents: 1 x 2.13 Inch E-Ink Display(No LoRa)<br><br>Specification: C Package Contents: 1 x 2.13 Inch E-Ink Display(470-510MHz)<br><br>Specification: E Package Contents: 1 x 2.13 Inch E-Ink Display(902-928MHz) 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 i