Ontech GSM 9030 has a built-in 230V/16A relay that can be remotely
operated by an ordinary telephone. You can call the Ontech Switch from any mobile phone
and operate it and/or extra relays by using the keyboard of the mobile device.
To the unit or the extra relay electrical equipment
such as fans, radiators, lamps etc can be connected and turned on or off with a
The Ontech Switch can also give you information whether the temperature is above or
below 5 degrees C.
If you are using SIM cash card, be aware that many network operators demands you are
sending at least one SMS or make one call every year. Some also demands you refill at
least once a year. Check with your operator.