USB to RS232 Serial DB9 Adapter Cable with COM Retention Quickly connect legacy or industrial RS232 serial devices to a laptop or desktop via USB, avoiding the need to replace existing peripherals. This adapter cable provides a durable, professional grade connection with stable data transfer and COM port retention for consistent device identification. Key benefits Connect RS232 DB9 devices to any computer USB port for data transfer, configuration, or control. COM retention preserves the assigned COM port across reconnections, simplifying device setup and software configuration. Built-in USB to serial converter chip delivers reliable communication and reduces compatibility issues. Durable construction and high quality materials for longer service life in workbench, office, or industrial environments. Features and specifications Function: USB to RS232 serial DB9 adapter cable with COM retention. Converter: Built-in USB to serial converter chip for stable communication. Connector: Standard DB9 male or female as required by RS232 devices. Length options: 1 m and 0.2 m. Material: Plastics. Color: As shown. Compatibility Use with legacy serial instruments, industrial controllers, barcode scanners, modems, and other RS232 DB9 devices. Designed for connection to laptop or desktop computers with available USB ports. Practical use scenarios Industrial equipment configuration: Connect a serial programming tool or PLC to a laptop for firmware updates and parameter tuning. Field service and diagnostics: Carry the compact 0.2 m cable for on-site troubleshooting of RS232 devices without needing a serial PC port. Legacy peripherals on modern computers: Use the 1 m cable in a lab or office to integrate older serial devices into current systems. Package contents 1 x USB to RS232 cable with built-in converter chip. Only the listed item is included. Notes Product appearance and printed text may vary slightly between production batches. These differences do not affect functionality. Color shown in images may differ slightly due to lighting and display differences. Measurement tolerance is +/- 1-3 cm.