Compact appearance, powerful computing functions, WIFI function, support for Arduino, rich interface and other product features. users can program the product through standard library and simple development language, and quickly complete program verification and product development. At the same time, it has an OLED display and a lithium battery interface, which can be used for simple management of charging and discharging of lithium batteries, and can be directly used as a development of handheld devices. This product does not directly use the more popular WIFI, LoRa and other modules, but directly based on chip-level development, on the one hand to minimize the size. The product's main control chip is a 32-bit processor - ESP32 chip. In addition to the WIFI function, it also supports BLE 4.2 and powerful LoRa wireless communication functions, which can be used as a gateway for IoT products or as a driver terminal product (such as sensors, stepper motors, etc.).