GSM doorphone module, emergency call version
Doorphone module with metal push button, in red box, microphone, speaker
With customizable inscription (fire, help, etc.)
2 relay outputs, which can be controlled with DTMF codes during a call
Free gate opening function, from 1000 phone numbers
Mains power monitoring
16,000 event memory, continuous GSM signal strength monitoring
Night mode
SMS, PC and Android programming
