These small coin size Key tags are isoprox compatible contactless tags work with the same 26 bit weigand readers that both the HID 1386 ISOProx and 1326 ISOProx key tags work with. They are similiar in appearance and function to the Microprox adhesive tags. Compatible 125khz card readers include: HID Proxpoint Plus, Thinline II, MiniProx, RP40, RP10, RPK40, RP15, Prox80, ProxPro, EntryProx 4045, Bosch ARD-AYJ12, Viking PRX-2, and many more.