The sub-unit (slave) extends your SMS master socket by a further, independent switching unit.
All the functions of the main socket are available without the need for another SIM card.
Applications such as controlling the heater, rebooting the router or controlling the irrigation system can now be controlled simultaneously via SMS.
Safe temperature control via SMS
This socket is an easy way to control the power supply and temperature of sensitive products. All you have to do is insert a standard SIM card into the device and plug it in, and you can check temperature values or set a temperature range.