1. Functional Features 1. The RS232 interface of the notebook extension can be converted to a serial interface via USB, enabling efficient and convenient connection to printers. 2. Supports the RS232 serial interface, remote power management, and a fully automatic serial communication handshake protocol. 3. Utilizes a professional chip for stable signal transmission, reliable performance, and broad compatibility. 4. Constructed with PVC environmental-friendly materials that offer insulation and flame-retardant properties; nickel-plated connector ensures durability and reliability. 5. Interface features a thickened nickel-plated layer, providing corrosion resistance, acid and alkali resistance, and performance in high and low temperature environments, contributing to an extended service life. 2. Precautions Please confirm the interface and plug before purchase. This product includes an RS232 9-pin plug. Verify that your printer has an RS232 9-pin interface to ensure compatibility. 3. Product Specifications 1. Product Name: USB to DB9 RS232 Connector Cable 2. Material: PVC 3. Cable Length: Approximately 120 cm (47.24 inches), 200 cm (78.74 inches), 300 cm (118.11 inches) 4. Instructions 1. Due to lighting effects and shooting angles, slight variations in color or appearance may occur. 2. Due to manual measurement, a tolerance of 01 cm is acceptable. 5. Package Contents 1 x USB to DB9 RS232 Connector Cable