RFID tag,RFID active tag,2.45GHZ tag,smart tag,with switch,save battery RFID tag,RFID active tag,2.45GHZ tag,smart tag,with switch,save battery Description:SpecificationsModel nameMR3820ACard shapeCard Frequency range2.4GHzInduced modeAuto-induced,timing transmit after outside factory two secondsIdentified distance3-80MMetarialPET,heat-proof,water-proofDimension87*55*5.5mmWeight20gBettery Inside ...