... :above 8m One-Four antenna ,TNC Connector MK-TS-304 UHF Four-Channels readerSpecification:Model NoMK-TS-304Support ProtocolISO18000-6B,ISO18000 ... -LED7 , LED 1-4 shows working status , LED 5 shows tags are readsuccessfully, LED 6 shows reader is working , LED 7 ... Temp-20°C~+80°CWe also have two-channels antenna UHF RFID card reader: