As a specificity of fixed readers, there is a family of desktop readers that can have a built-in antenna for short-distance reading use and are atypically linked to a desktop workstation. Their variety enables to distinguish different features such as:
Windows, IoS or Android support
Communication: Bluetooth, BLE, USB, PoE, RS232, …
USB or mains power supply
Reading range: up to 45 cm
For readings of a not particularly high number of tags.