Zoom 3095 USB Mini External Modem - USB - 1 x RJ-11 Phone Line - 56 Kbps USB Powered - no batteries or power adapter required. USB plug is built into modem. USB version 1.1, 2.0, and 3.0 compliant Supports the latest dial-up modem standards and faster Web browsing with V.92, V.90 and V.44 Fast Connect Times with V.92 QuickConnect Fax Support - a Windows or Mac OS X (v10.6 or later) computer is required Compact Size - Great for the road or the office.