SpecificationsPortsUSB (type-A Male)RJ-11 (common telephone/dial-up modem interface)ApplicationsMake Voice Calls from your PCSend/Receive Fax with your PCConnect to the internet at 56k dial-up modem speedsOperating SystemsWindows 98SE, ME, 2000, XP, Vista (32 and 64 bit), 7 (32-bit)