| 1.
Anti-interference; anti-decode |
| 2. Digital LED defense zone
display: |
| 32 wireless and 7 wired defense zone |
| 3. 10-second voice record |
| 4. 6 user phone numbers |
| 5. reminder sound of defense
zones |
| 6. Telephone line failure
alert: |
| if telephone line is cut or short
circuit, |
| the siren will alarm. |
| 7. Built-in backup
battery |