Ontech GSM module, SMA/F, 900 MHz/1800 MHz, GSM

Alarm transmitter and remote relay for controlling and switching on/off electrical equipment, such as heaters, pumps etc. via GSM network. All kind of Mini-SIM card can be used. You control the unit with an app, both Android and Iphone available. You can also use SMS to control it. Dry contact relay output with closing or breaking function, without or with delay. Two alarm inputs settable for closing or breaking function, with or without delay. Can remember position of relay after main power break. Frost guard which automatically alerts (+5 °C) and programmable temperature alert. Alarm via SMS, the unit can send alarm messages to up to 9 different mobile phones. Temperature alert for low or high temperature (frost guard). Displays current temperature. External temperature sensor can be connected, the cord is 2 meters but can be extended up to 10 meters. Temperature sensing can be used as thermostat function via relay.