USB to RS232 Serial DB9 Adapter Cable with COM Retention Overview This USB to RS232 adapter cable provides a simple, reliable way to connect legacy or industrial RS232 serial devices to a laptop or desktop via USB. The cable includes a built-in FTDI chip for stable communication and COM retention that helps maintain a consistent port assignment across reconnects. Key benefits Keep existing equipment working: Connect serial devices without upgrading peripherals or controllers. Stable and reliable connection: Built-in FTDI chipset and COM retention reduce driver and port reassignment issues. Durable and ready for everyday use: Constructed from high-quality plastics for longer service life. Features Function: USB A to RS232 DB9 serial connection for data communication and device control. COM retention: Preserves COM port assignment for consistent device recognition by software. Chipset: Includes a built-in FTDI chip for reliable serial conversion and broad driver support. Material: Plastics housing and cable construction for durability. Length options: Available in 1 m and 0.2 m lengths to suit desktop or compact setups. Color: As shown. Compatibility: Works with serial devices that use RS232 DB9 interfaces and computers with USB ports. What you get 1 x USB to RS232 cable with built-in FTDI chip Other items shown in photos are not included Typical use scenarios Industrial automation: Connect programmable logic controllers, meters, or sensors to a modern PC for monitoring or configuration. Point of sale and retail: Link receipt printers, barcode scanners, or cash drawers that use RS232 to a POS terminal or computer. Development and testing: Interface with embedded systems, serial consoles, or legacy equipment for firmware updates, debugging, and data logging. Additional notes Due to different production batches, there may be slight variations in appearance and printed text that do not affect function. Color may vary slightly because of lighting and display differences. Measurement tolerance: +/- 1-3 cm. This adapter provides a straightforward solution to bridge USB and RS232 connections while maintaining consistent COM port behavior for reliable software integration.