1 Can be controlled anywhere, not limited by distance. 2 There is no charge for each request. The GSM alarm system rejects calls from authorized numbers and then returns to temperature, humidity. 3 Up to 10 authorized phone numbers, 5 can be used to answer calls or text messages, and 5 can be used to make calls and text messages when an alarm occurs. 4 Externally monitor the status of the AC power, the AC current on/off will send a text message to the authorized phone number. 5 Timer report - can be configured to automatically send its status/value to the authorized number every x hours.
What's in the box
1 x Temperature Humidity Alarm
