RFID readers are devices designed to communicate with RFID tags and RFID cards to capture, process, and transmit data. These devices can identify, track, and manage items or individuals with RFID tags by sending and receiving signals through various radio frequencies. Depending on the application, RFID readers may come in different forms, including handheld RFID readers, RFID Scanners, or fixed RFID readers attached to warehouses or store entrances. RFID desktop readers are also popular in office settings or point-of-sale counters for quick data capture and inventory checks.

There are three main frequency categories for these RFID reader writer devices: Low Frequency (LF), High Frequency (HF), and Ultra High Frequency (UHF RFID reader). LF readers excel in applications like animal tagging; HF readers are often used for contactless payments and secure access control. In contrast, UHF readers are favored in supply chain management due to their extended read range and fast data rates. Whether used as an RFID tag reader for simple inventory tasks or integrated into large tracking systems, RFID readers significantly improve operational efficiency, visibility, and security.