Synaptics’ new USB scanners shrink fingerprint readers down to a minuscule dongle that you can leave attached to your computer at all times. USB scanners are designed to work alongside the biometric security options in the latest versions of Microsoft Windows. Theres no word on whether USB-C versions will be offered when these start hitting the market sometime later this year. The biometric readers do mean sacrificing a USB port if youre using a smaller laptop with a limited number of ports.”]
Source: https://gizmodo.com/ultra-thin-dongles-make-it-easy-to-add-biometric-securi-1780747981