US Robotics Courier 56K Modem 3453B MISSING AC POWER ADAPTER Used | eBay
US Robotics USR5686G - modems (RS232 DB25, 0 - 50 °C, 20 - 80%, Serial Port Phone Line Serial Cable, 165.1 x 95.25 x 33.02 mm, -20 - 70 °C) : Amazon.co.uk: Computers & Accessories
ᐈ US Robotics USR025630G • best Price • Technical specifications.
U.S. Robotics USR3453C Courier Global Business Modem - Newegg.com
US Robotics Modem 56k "Sportster Flash" - from circa 1995 : r/vintagecomputing