RFID USB Pocket is a RFID reader the size of a pendrive
NFC RFID USB Device ACR122U (Read – Write) – Future Electronics Egypt
Create A Simple GUI For USB RFid Reader RM4100 Using Raspberry Pi [BM] - YouTube
External RFID Card Reader 125 kHz + 13.56 MHz with NFC (USB) | Axis Communications
SL500A-USB | STRONGLINK RFID Reader/Writer 13,56MHz
125khz Rfid Reader Em4100 Usb Proximity Sensor Smart Card Reader No Drive Issuing Device Em Id Usb For Access Control - Access Control Card Reader - AliExpress
Amazon.com: RFID Card Reader, UHF USB Desktop Reader Writer 902~928MHz Frequency, 50cm Contactless Proximity Sensor Built-in Buzzer, Compatible with ISO18000-6C, ISO18000-6B : Electronics