Product Description. TRENDnets TU-ETC is a compact 10/Mbps network adapter for the USB interface. The TU-ETC features plug-n-play installation. USB to 10/ Mbps Ethernet Adapter. The TU2-ET is a high-speed USB network adapter that allows you to easily connect to a 10/ Mbps network. Find great deals for TRENDnet Tu-etc USB to Rj45 Ethernet Adapter. Shop with confidence on eBay!