56K data/fax modem with Dual 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. Supports Windows 98/ 98SE/ ME/ 2000/ XP/Vista/Win7/Win8 8.1/Win 10 Support Caller ID and distinctive ring detect, Auto format/speed sensing, Data/Fax/Voice call discrimination, Single configuration profile stored in host, call forward/fallback. 2 RJ11 Ports, you can set your telephone, fax system. Up to 56K data download, 48K data upload, and 14.4K fax communication.Provide Quick Connect and Modem-on-Hold features.