Features： 1、[USB to IIC or I2C] This module has the function about USB to IIC or I2C, for flashing chip, IIC device control, machine brush. And also can be used separately as master. 20K, 100K, 400K, 750K adjusting communication rate. 2、[USB to UART] This module also has the function about USB to UART, for serial data, ISP program download, STC or for STM series microcontroller, with serial data communication. 3、[50bps to 2Mbps] The serial data communication of our USB to UART adapter module is 50bps to 2Mbps, and can be configured for non conventional baud rate use. 4、[Status Display] This USB to IIC I2C UART converter adapter module provides LED lamp status display and switch voltage side. 5、[Voltage Output] USB to IIC adapter module provides 5V and 3.3V voltage output and overall lightweight, stable and simple for installation. Specification： Item Type: USB To IIC I2C UART Converter Adapter Module Material: Electronic Components Features: 2. USB to UART (Serial data, ISP program download, STC or for STM series microcontroller) Serial data communication (50bps to 2Mbps, can be configured for non conventional baud rate use) 3. ISP mode program download (STC or for STM series MCU) 4. USB to IIC or I2C (Flashing chip, IIC device control, machine brush) can be used separately as master. 20K, 100K, 400K, 750K adjusting communication rate 5. With LED Lamp Status display Package List： 1 x USB To IIC I2C UART Converter Adapter Module 1 x Jumper Wire