Specification: Origin: Mainland China Model Number: USB UART Board Size: 48.26x16.51mm/1.9x0.65inch VCClO: Output 3.3V/5V (module powered by TypeC, must jump the jumper cap to 3.3V/5V) GND: connect to GND  TXD: connect to MCU.RX (signal flow direction: MCU.RXPC.RX) The module is TypeC to TTL level, do not connect directly to RS232 level to avoid burning the module. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x PL2303 USB UART Board (Type C) 1 x Dupont Cable Loose Head 6PIN to Customised 1. Upgraded PL2303GS Chip: This USB UART board features the latest version of the PL2303GS chip, ensuring reliable and stable performance. It provides seamless connectivity and efficient data transfer between your computer and devices. 2. Wide Compatibility: The USB to UART module supports various operating systems, including Windows XP, 7, 8, 10, and 11. Enjoy hassle-free compatibility with your preferred system, allowing for versatile usage. 3. Flexible Power Options: This serial communication module offers three power supply options through the use of jumper caps. Choose between VCClO-5V (external 5V power supply), VCClO-3.3V (external 3.3V power supply), or no jumper cap (external power supply options such as 1.8V, 2.5V, 3.3V, or 5V). Adapt the power supply to meet your specific needs. 4. Onboard LED Indicators: With three onboard LED indicators (TXD, RXD, PWR), this TTL serial module provides visual feedback on the transmission status and power status. Easily monitor the communication process and power supply at a glance. 5. Easy to Use and Install: The USB to serial adapter is designed for user-friendly operation. Simply connect it to your computer using a USB interface, and you're ready to go. No complicated setup or additional drivers required, making it convenient for users of all levels.