m5Stack A105 ESP32 Downloader Kit is a USB-TTL adapter board for the ESP32/ESP8266, an RF System-on-Chip (SoC). This item contains either a CP2104 or CH9102 chip. It supports one-touch download without chip and pin-down resetting manual. The plug-in board and row of pins parts from the set can be convenient for ESP32/ESP8266 series development board or M5Stack series products for program burning or serial debugging.