RFID,RFID tag,active RFID tag,water-proof,smart card,can be used with reader locator to positioning,smart tag RFID,RFID tag,active RFID tag,smart tag,water-proof,can be used with reader locator to positioning Description1.MR3820A active electronic tag has the function of location and waterproof2.It is suitable to use frequency hopping working mode,the anti-jamming ability is rather well.3.Can be ...