USB 56K Voice Fax Data External V.90 V.92 Modem With Dual Ports, Compatible With Windows 98SE/2000/ME/XP/Vista/Win 7 and Support Auto-Dial, Tone and Pulse Dialing, Auto Answer, Auto Retrain (Black Color) 23 56K data/fax modem with USB interface, compliant with V.90, and V.42/V.42bis/MNP5 protocols and V.17, V.29, and V.27ter Group 3 fax protocol.
Support Auto-Dial, Tone and pulse dialing, Auto answer, Auto retrain.
Support Windows 98SE/2000/ME/XP/Vista/Win 7.