olemus
väikeseade, mis ühendatakse arvuti (USB-)pordiga otse või lühikaabliga

Wiktionary:
1. (computer hardware) any small device that plugs into an electronic device, typically a computer, and alters its functionality Common examples include wireless modems, digital media players, software copy protect devices, and adapters.

ülevaateid
https://en.wikipedia.org/wiki/Dongle

näiteid
https://duckduckgo.com/?q=%22dongle+device%22&t=h_&iax=images&ia=images