Sweex 56K USB Modem. Modem speed: 56 Kbit/s, Interface: USB, Form factor: Desktop. Maximum fax transfer rate: 14.4 Kbps. Data link protocols: TU-T V.92, V.90, V.34, V.32 bis, V.32, V.22 bis, V.22, V.23, V.21, Bell 212A & Bell 103