active rfid tags/active tag/rfid active tags,with 80m reading range,used in people position and goods tracking ModelMR3820ATag TypeCard TypeFrequency2.45GHz and 13.56MhzRF ModeAutomatically, default 1 second timing transmitReading Range3-80mMaterialPET, high temperature resistance, waterproofSize85*55*5.5mmWeight20gBatteryBuilt-in button Li Battery, stand for 2 yearsactive rfid tags/active tag/ ...