Key Fob / Key Card Readers are electronic devices that “read” a fob or card (credential). When presented with an authorized credential, the reader sends a signal to open a gate or door. Current standard readers are proximity readers, which means that the credential simply needs to be waved past the reader in order for it to read. The benefit of Key Fob / Key Card readers is that credentials are easy to use and offer a higher level of security since the credential can only be in the possession of one person at a time. These kind of readers are less likely to be passed along to an unauthorized person. The key to great security is EES.