[USB to IIC or I2C] This module allows for flashing chips controlling IIC devices and serial data communication. It can also be used separately as a master with adjustable communication rates. [USB to UART] This module provides serial data communication and supports ISP program download for STC or series microcontrollers. [50bps to 2Mbps] The serial data communication of our USB to UART adapter module is adjustable from 50bps to 2Mbps allowing for non-conventional baud rate use. [Status Display] This converter adapter module features LED lamp status display and switch voltage side for easy monitoring. [Voltage Output] The USB to IIC adapter module provides 5V and 3.3V voltage output making it lightweight stable and simple to install.