MIFARE proximity keychain
The 52740 proximity keychain from Fermax is compatible with proximity devices that work with the Mifare system, such as the Fermax 5248 proximity kit.
The MIFARE proximity keychain works at 13.56Mhz and is a user identification device.
Each device has the identifier marked to register it in the system manually.
In addition, this proximity keychain does not require maintenance or batteries.