1. Original FTDI/FT232RL new chip, with chip ID to verify authenticity 2. Support old EPSON printers 3. Length: 1.8 meters, other lengths can be customized based on data. 4. Packing list: One USB DB25 control line 5. FAQ Q1: How to use the product? A1: Insert the USB interface into the USB of the computer, connect the device to the other port, and start debugging after the computer driver is successfully installed. Q2: Do you need to install the driver? A2: For systems below WIN 7, please go to the FTDI official website to download the driver suitable for your operating system. WIN 7, WIN 8, and WIN 10 will automatically install the driver when connected to the Internet. The operating system must turn on automatic updates and connect to the Internet to automatically install the driver. The driver download time is related to the network speed, generally about 10 minutes Q3: Can the serial port be modified? A3: If a port error occurs, please change it under USB-SERIAL-PORT in the device manager. When changing, please select the port in use. Q4: What should I do if the product cannot be used normally? A4: The first step is to re-plug the USB port, or change a USB port; The second step is to check whether the driver is installed successfully, or automatically find the driver; The third step is to restart the computer and insert the USB twice.