Accentronix wireless GSM intercom infinity 2-Button. 
 
Features
 
Centralized management for one or more properties and complexes
Calls directly to your mobile phone or land line
Complete Log Reports
Access control notifications with sms backup
Monitor gate status, battery voltage and power failures
Advanced open/close timers with public and school holiday features
Guardhouse feature for incoming calls
Automatic PABX switchboard selection
Crystal clear sound
12Vdc to 24Vdc @ 200mA
3 Relay outputs (Entrance,Pedestrian, and Exit)
2 Inputs
Marine 316
 
INTERCOM-2B