... (1)2.45GHZ active rfid tag (2)key rob tag,small and elegent design,easy to ... take (3)durable,battery changeable 2.45GHz Active key FOB tag, active RFID tag, RFID long range ... a kind of active tag that can be on key fob.l FHSS working mode, with anti-jamming ... area for users to use permanently.Specification ModelMR3821ATag TypeActive key fob styleWorking Frequency2.45GHzSense ModePassive sense or auto ...