06|Power & Surge|UPS & Solar|Utilities Micro Instruments GSM Relay Rev D With Temperature Monitoring, 2 Inputs, 1 Relay MI-GSM-RELAY-DPOR Order-on-Demand The GSM Relay Rev D is a GSM based control module, controlled via SMS with 2 inputs and 1 Relay output. The main usage for the unit is to reset router boards which have became inaccessible through wireless networks as well as informing the user about mains power failures and other alarms such as low battery conditions. The GSM RELAY D features high and... View