StarTech.com USB 2.0 Fax Modem - 56K External Hardware Dial Up V.92 Modem/ Dongle/Adapter - Computer/Laptop Fax Modem - USB to Telephone Jack - USB Data Modem - Network Fax/CMR/POS. Modem speed: 56 Kbit/s, Interface: USB 2.0, Chipset: Conexant - CX93010-21Z. Supported data transfer rates: 56 Kbps Down, 36.6 Kbps Up, 14.4 Kbps Fax, Upstream data rate: 0.036 Mbit/s, Downstream data rate: 0.056 Mbit/s. LED indicators: Data. Compatible operating systems: - Windows 7, 8, 8.1, 10 - Windows Server 2008 R2, 2012 R2, 2016, 2019 - Mac OS 10.9 to 10.10 -.... Compliance certificates: RoHS, CE, Federal Communications Commission (FCC), REACH, Trade Agreements Act (TAA), Certification: CE, FCC, RoHS, REACH, TAA