Table 1—Visit ZeitControl’s on-line store to learn about these versions of the smartcard.
| Model number | RAM | EEPROM | Encryption | FL. Point |
| ZC3.7 (Enhanced) | 256 bytes | 2 KB | DES | Y |
| ZC3.9 (Enhanced) | 256 bytes | 8 KB | DES | Y |
| ZC5.4 (Professional) | 1 KB | 16 KB | DES, AES | Y |