Internet connection via WLAN. WLAN 802.11 g/b, WEP&WPA2 encryption. Sensors and functions can be controlled via APP. Integrated GSM telephone dialler (Quad-Band). Large illuminated LC display with 13-digit numeric and alphanumeric display. Operation via backlit "touch" input field. Hands-free operation / room monitoring on the base unit. Audible alarm via built-in siren. Alarm notification programmable to external telephones. Telephone alarm with automatic announcement function. Up to 10 alarm numbers and 1 emergency number (SOS) programmable. Warning when the batteries of the sensors are low. Power failure protection in the base unit. Alarm mode - Silent mode - Home mode - Unsharp mode. Room monitoring - Hands-free mode can be switched on/off from external telephones. Wall mounting possible. Expandable to operate up to a maximum of 64 sensors, (max. 16 per sensor type). Expandable for the use and application of IP cameras, heating thermostats, electrical switches, etc. Easy integration of optional sensors in plug & play mode.