Send SMS alert messages to up to 6 preset mobile phones when an alert entry is triggered. 1 channel GSM SMS alarm, external rechargeable battery (not included) for power failure alarm. The input of GA01P is the switching signal. When the input port is short-circuited to ground (GND), the GA01P sends an alarm message to the preset mobile phone or calls the set alarm number. The content of the alarm message can be set by itself. You can use custom SMS alert text. Smart and slim gsm design case for easy installation on other target system cards, adding GSM alarms., Manufacturer: EVTSCAN