By combining a card reader with uniFLOW or uniFLOW Online, organizations can lock printers, scanners or multifunctional devices while still allowing authorized users quick and easy access to a device.
The MiCard MultiTech4 BLE card reader includes Bluetooth® Low Energy technology which enables users to identify at a device by using their smartphone.
https://youtu.be/yEVEP97sUG8
For this purpose, they just need to download the NT-ware Mobile Badge BLE app from Apple App Store or Google Play Store. Besides BLE, the two versions of this card reader support a wide range of card technologies.
SOURCE NT-ware
MiCard MultiTech4 BLE Card Reader: Bluetooth® Low Energy for User Identification and Access Control