Senthys SensArray Core RAIN UHF RFID 4-Port Reader, RHCP, USA & Canada & UK Frequency - 902.75 MHz 927.25 MHz, Hopping Channels - 50, Size: 25.0mm x 25.0mm x 2.0mm - SensArray Core RAIN UHF RFID 4-Port Reader, RHCP, USA & Canada & UK Frequency - 902.75 MHz 927.25 MHz, Hopping Channels - 50, Size: 25.0mm x 25.0mm x 2.0mm, internal 8.5dBic antenna, 3 additional antenna ports (allowing 4 antenna systems) and a 4 in/4-out 30W, powered (optically isolated) GPIO subsystem. Internal Antenna 8.5 dBic, right-hand circular, Data Interface - TCP/IP (RJ-45), 4-Ports, PoE - Interface 4 ports; PoE+ Class 8 (90W input), PD on Port 0, Power Injector/Supply PoE+ injector, PN SPOE90WC8, GPIO 4 input/4 output, provides 24 vdc, 1.25A (30W)