GearMo USB RS-232 Serial Adapter with LED Indicators Windows 10, 8, 7, Vista, XP, 2000 Support 5ft standard USB to rs-232 cable with double color led display of full signal power Full rs-232 signal led tester output via dual color display Ftdi chip USB to rs-232 cable with led monitor Easy test rs-232 host to device link Os compatibility: Windows 98, xp, 7, 8 and windows 10 as well as Linux and mac os 10.X