EAS 2-Port External USB Voice/Fax 56K Modem V.90/92 -Hardware Based Dial-up Data Interent for Win7 Vista XP 32/64 Bit 56K data/fax modem with USB interface, compliant with V.90,V.92 and V.42/V.42bis/MNP5 protocols, V.17, V.29, and V.27ter Group 3 fax protocol. Provide Quick Connect and Modem-on-Hold features, up to 56K data download, 48K data upload, and 14.4K fax communication. Support Caller ID and distinctive ring detect, Auto format/speed sensing, Data/Fax/Voice call discrimination, Single configuration profile stored in host. Support Windows 98SE/2000/ME/XP/Vista(32/64 Bit)/Win 7(32/64 Bit). 2 RJ11 Ports, you can set your telephone, fax system.