StarTech.com 4 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Converter Hub - IP30 Rated - Din Rail Mountable Metal Serial Hub - 15kV ESD Protection (ICUSB234854I) AV & Surveillance 1 Mode Switch

1 Mode Switch

including 5Gbps speeds via two USB-A 3

Enjoy up to 75Hz refresh rate with Adaptive-Sync technology to eliminate tracing for a crisp and clear video playback and save desk space with its VESA wall mountable backing

you quickly pop in 2 more AA batteries

and control a wide range of serial devices

StarTech.com 4 Port Serial Hub USB to RS232/RS485/RS422 Adapter - Industrial USB 2.0 to DB9 Serial Converter Hub - IP30 Rated - Din Rail Mountable Metal Serial Hub - 15kV ESD Protection (ICUSB234854I) AV & Surveillance 1 Mode SwitchAdd four extra COM ports to your laptop or desktop computer, quickly and easily. This USB to RS232 422 485 serial adapter lets you connect to your serial devices through an external USB port. Supports multiple serial protocolsThe versatile serial adapter converts a single USB port into four RS232 RS422 RS485 serial ports, enabling you to connect, monitor, and control a wide range of serial devices, such as sensors, barcode scanners, and LED signage.