The GSM CallFree2 is a GSM remote control switch that is activated by calling its
mobile phone number. No call costs are incurred as it rejects the
call without answering and switches on the device connected to it.
CallFree2 can also be connected to PIR’s, burglar alarms, water
level or leakage sensors, Carbon Monoxide detectors, etc. and will
send a text when an alarm condition is triggered.