dongle

suojausavain puhekieltä Any small device which plugs into an electronic device, typically a computer, and alters its functionality. Common examples include wireless modems, software copy protect devices, and adapters. Some USB keyboards and mice include USB to PS/2 adapter dongles, enabling their use on machines with PS/2 ports.
2012, Tecca, Yahoo! Tech, FreedomPop offering 1GB of free wireless data, hopes you’ll pay for more, http://news.yahoo.com/blogs/technology-blog/freedompop-offering-1gb-free-wireless-data-hopes-ll-205424705.html link

FreedomPop will offer three different flavors of broadband: a USB dongle that allows you to connect your computer to the internet, a WiFi hotspot device, and an iPhone case that allows you to override the phone's existing network and use it as a FreedomPop hotspot.