Features: On the hardware side, the ESP32-MINI-1 module is used, which is equipped with a RISC-V 32-bit single processor Supports up to 96MHz main frequency, 4MB It also with CH343 port and CH334 USB onboards, and can be used and developed for USB and UART through a UsbC interfaces; The pin interfaces for ESP32 DevKitM-1 development board and can be extended to various peripherals devices On the software side, you can choose the official development environment for development Specifications: Module: ESP32-MINI-1 Processor： RISC-V 32-bit Single Memory:4MB Connections: UART、l2C、LED Onboards: CH343 port and CH334 USB Size:about 5.16x2.54x0.1cm/2.03x1x0.04in Package Type: Standard/with Welding Needle Package Includes: 1PC ESP32-MINI-1 Module Board note: Due to the problemsof lighting effects- and shootingangles, there mightbe tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.