1. Compact design, magnificent appearance; 2. B/W, Color camera, Infra-red light source at night; 3. Calling & Talking, Two-way communication; 4. Up to 2 interphone available; 5. Monitoring at any time; 6. Timely switching-off while monitoring or talking; 7. Reminding for hanging off; 8. Monitoring time: Automatically switching-off in 30 seconds; 10. Talking time: Automatically switching-off in 45 seconds.