The "USB-RSAQ Series" is a conversion adapter that allows you to connect RS-232C peripherals via USB. It supports modems and terminal adapters, which are typical RS-232C devices, as well as digital cameras and PDAs. It supports DTE speeds up to 230.4Kbps, maximizing the performance of terminal adapters. In addition to simply replacing the connection port, there are USB-specific advantages that RS-232C connections lack, such as "not consuming system resources" and "easing restrictions on the number of connected devices." It supports both Windows and macOS X, allowing you to use RS-232C devices even on the latest MacBook Pro and Mac mini, which do not have RS-232C ports.