... and keypad audio4. Optional built-in Li-Battery for time attendance5. External speaker plug port for scheduled bell ring6. Optional ID/Mifare/HID ... , keypad audio, anti-pass back, built-in photo ID, webserver for A/C, scheduled bell.Access control: built-in relay, with ... /Mifare/HID card reader, USB reader, RIS, built-in Li-battery, printer, soap, 9 digits. Auto-status.