Welcome to our shop! Introducing our USB Port Converter Module. This module is equipped with a CH341A chip, which is a USB bus transmission chip. It supports both serial port and parallel port, providing asynchronous serial port, printing port, parallel port, and commonly used 2 wire and 4 wire synchronous serial ports through USB bus. This module has a wide range of applications. It can be used for serial port expansion, I2C interface EEPROM and SPI interface FLASH. It is also suitable for STC microcontroller programming, program debugging, and data acquisition. With this module, you can easily convert USB to printer parallel port and EPP or MEM parallel port. It is versatile and has multiple functions. The USB port converter module also supports USB to UART, I2C, and SPI interfaces, making it useful and practical. It provides great convenience for various applications. Additionally, this module has an onboard indicator for output voltage and level signal. You can choose between 3.3V or 5V. It also has an onboard UART and SPI or I2C working status indicator. We strive for 100% satisfaction. Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service. Thank you for choosing our USB Port Converter Module. Happy shopping! Note: Please ensure that the product size information is detailed and accurate. Include delivery details and quantity in the description. Return the description in English. Avoid using HTML codes and keep the description concise and clear.