... control your home appliance, Water,Oil and gas pipelines by a SMS based on GSM( 4 Input / 2 Output ... / USB Ports ) The GSM SMS Controller-Alarm is a very simple device which can be used for authorized door ... ON/OFF your system, machines, equipments remotely with a SMS text from your mobile phone and protect your ... (240VAC@3A) can be switched ON/OFF by sending a SMS text; 1 relay output (240VAC@3A) can ...