PerformanceProduct name:UHF RFID four port reader moduleModelAM-4RFrequency865-868mhz or 902-928mhz (adjustable with different countries and regions)Air interface protocolEPC global UHF Class 1 gen 2/ISO 18000-6CChipImpinj R2000Communication interfaceTTL UARTVoltageDC 3.6v-5vStandby working current