Conceptronic C56U, V.92, 56 Kbit/s, USB 2.0, Conexant CX93010, CD-ROM, Windows XP, Windows Vista, Windows 7 Conceptronic C56U. Modem type: V.92, Modem speed: 56 Kbit/s, Interface: USB 2.0. Minimum system requirements: CD-ROM, Compatible operating systems: Windows XP, Windows Vista, Windows 7. Weight: 1.06 oz (30 g), Depth: 7.87" (200 mm), Height: 0.787" (20 mm). Cables included: Phone (RJ-11), Bundled software: BVRP Software