... , also RS232/485 included,can be widely applicable for Villa, Office, Hotel, Bank and other secure access or buildingsFeatures: 1. With ... lock just have 4-6 keys.2. Three privilege levels for different graded users: Administrator, common user, visitor.3. Be able ... forgotten keys ever again.included, can be widely applicable in Office, Hotel, Bank, and other secure access or buildings.(Stand-alone ...