... interface Reading Range:above 8m One-Four antenna ,TNC Connector MK-TS-304 UHF Four-Channels readerSpecification:Model NoMK-TS-304Support ... configurableCommunicationInterfaceStandard RS232 ,RS485,RJ45Output PortGPIO outputReading RangeDepends on antenna gain,connect 12dBi antenna, the reading distance,above 8 mLED IndicationLED 1 ... Temp-20°C~+80°CWe also have two-channels antenna UHF RFID card reader: