The 26-bit Keyfobs Proximity Fob can be used with Prox Key ISOProx 1346 1386 1326 H10301 format card reader. Our H-ID cards are low-frequency which can be read, copied, and repeatedly erased. Low frequency card frequency is 125KHZ, high frequency is: 13.56MHZ, we are low frequency. | COMPATIBLE: These isoprox compatible contactless Keyfobs work with the same 26 bit weigand readers that both the 1386 ISOProx and 1326 ISOProx key cards work with. Compatible the card readers include: Proxpoint Plus, Thinline II, MiniProx, RP40, RP10, RPK40, RP15, Prox80, ProxPro, EntryProx 4045, Bosch ARD-AYJ12, Viking PRX-2(If you are not sure whether your system is compatible, please contact us before placing an order) | Universal format: 50 Prox 26-bit key chain 125khz access control sensor key chain adopts 26-bit H10301 standard format for most access control security systems. | Facility Code: 127 or 137. Tags number Range: 00001-65000, they are random but running . | Package Includes: 50pcs black Prox 26 Bit Keyfobs,HI-D cards can only be used on H-ID card readers, and the frequency is generally 125KHz.The most commonly used H-ID card format is: WG26. Not all access control systems are compatible. If you are not sure whether your system is compatible, Please contact us before ordering.