"IMPINJ Speedway Revolution 4-Port UHF RFID Reader with POE and 4 antenna ports. Does not come with power supply or power cord, please purchase separately.

Impinj Speedway R420 RFID readers deliver the performance, quality, and reliability necessary for item visibility platform solutions.

The Impinj Speedway R420 RFID readers continuously senses environmental RF noise and interference levels, automatically selecting appropriate reader configuration settings. Impinj Speedway R420 RFID readers senses where tags are in the field and automatically focuses more time on the antennas with the largest tag populations in view. Simple deployment is made possible via Power over Ethernet (PoE), with enterprise-class management and monitoring."