Guard against theft card

Master and supplementary card can work in pair,one to many and will send alarm among each other(max one to eight).Master card will be used by main user,supple mentary card will be used by the protected object.(children,pets,important luggage).Anti lost anti theft effective rang can be customized,to protect the object with in the covered area,can be adjusted from 1-50 meters when the protected object is out of the protecting range,mastercard and supple mentary card will alarm loundly to remind the owner that the protected object is possible to be lost or stolen.

Double alarm protection,Master and supplementary car will send aiarm at the same time,It can alert the owner as well as the protected object or give warning to the thief that one is being tracked.

Super thin design(Thickness