... ( 1 wireless SOS zone, 1 wireless fire alarm zone, and the other 6 wireless zones can be defined by user). 3 ... operate. 7. Can connect with intercom. You can talk to the mainframe with intercom. 8. Switch to Backup rechargeable battery when ... alarm signals to monitoring center through GSM network, such as the police station. Support language: Chinese, English, Spanish, French, Russia (optional ...