How many valid cards can I add at maximum?

800 valid cards.

CMD Initialization

[30191000]→[99]→[30191000] *Initialization will require you to re-set settings since all data will be deleted

Hardware Initialization

ROMV2.X [Power Off]→[Press 3 and Push button]→[Orange LED lits,Press 6]→Controller restarts Press 6 to restore factory settings , Press 9 to clear master card no. ROMV1.X [Power Off]→[3]→Power On