SUPPORTED OPERATING SYSTEMS: The USB to serial converter adapter is compatible with Windows and Mac operating systems. Windows 10, 8.1, 8, 7. Mac OS 10.11, 10.10, 10.9, 10.8, 10.7, 10.6 USB: The USB to serial adapter supports USB 1.1 and is compatible with USB 2.0 and USB 3.0 ports. NDAA COMPLIANT: This USB to Serial 9-Pin Converter Cable is NDAA compliant, suitable for government-related networking solutions in the U.S. and Canada. RELIABLE TECH SUPPORT: Our team of advisors, support, and technical experts is available during normal business hours to assist with your needs. RS-232 SERIAL CONNECTOR: Connect RS-232 serial devices such as modems or printers using the widely supported USB standard found in most laptops and desktops. EASY SETUP: Simple installation in seconds. Insert the cable into your computer. FLEXIBLE CABLE: Integrated and flexible 540mm (21 in.) USB 2.0 cable accommodates most installation scenarios. Total cable length is 25 inches including the RS-232 (9-pin) and USB Type A connectors. MANUFACTURER PROTECTION: We stand by the quality of our products. The TU-S9 USB to Serial 9-Pin Converter Cable is backed with 2 years of manufacturer protection.