GSM Enviroment Alarm

We are offering gsm enviroment alarm.
The gsm sms environment alarm is special for remotely monitoring onsite temperature, humidity, power status through wireless gsm network. When the temperature, humidity, power voltage exceed high threshold or low threshold value, will send sms alert to upto 10 preset mobile phone immediately.
Just dial from authorized user number, the gsm environment alarm will reject at the first "ring", no communication cost, and then return the current temperature, humidity, power status or voltage. Moreover, it can report onsite environment interval or daily.
Mainly features of the gsm environment alarm:
1. can be operated from anywhere, no distance limitation;
2. no call charges for inquiry. The gsm environment alarm rejects the call from authorized number then return onsite temperature, humidity, and power voltage on the first 'ring';
3. multiple applications. (temperature, humidity, power status, solar panel, dc voltage);
4. up to 10 authorized phone numbers, 5 can be used to receive call or sms,and 5 can be used to call and sms while alarm occurrence;
5. one temperature & humidity sensor input, measures temperatures from -40-80°c,0.5°c accuracy, relative humidity from 0-99rh%, accuracy is 3%;
6. external ac power status monitoring, ac onoff will send sms to authorized phone numbers;
7. inbuilt mcu monitoring the dc input voltage value, measure range is 9-24vdc, no need additional sensor to save cost;
8. timer report-can setup every x hours automatically send its statusvalue to the authorized numbers;
9. support remotely read historic data via sms;
10. Rechargeable backup battery inside can last