BThe C.Concierge (TM) Wireless RF Credit Card Extended Range Electronic Keys or Purse Finder ReviewbP PP The C.Concierge (TM) Wireless RF Credit Card Extended Range Electronic Keys or Purse Finder PELIGIBLE FOR PRIME! New Louder Chirp, 1 minute to setup Just push button on the card key chain will sound alarmPBatteries are included Easy battery replacement,RF technology,Environmental, Stable function, No-RadiationPRange up to 120 ft. Receiver is very small and light weight and no bulky base station required. Can add multiple key Fab's to one card.