USB 56K External Dial Up Voice Fax Data V.90 V.92 Modem Window 7 XP Vista Error Correction capabilities: V.42, MNP2-4 Supports Caller ID(optional) Operating System Supports: Windows 98 SE/ME/2000/XP/Vista/Win 7 Small size, light-weighted, easy to carry Package include: 1x 56K USB 2.0 V.92 Dial Up Voice Fax DATA Modem 1x CD Driver 1x Telephone cable