Adapter 4xDB9/m (RS232) - USB-B/f

4 RS232 ports with DB9 male - Type-B female USB 1.1 specification Plug and Play installation Reset button for detecting newly connected peripherals Bus-powered, no AC adapter required Operating systems: Windows 98SE/ME/2000/XP, Mac OS 8.6 and later Includes: USB Type-A male - Type-B male approx. 0.8 m