GSM industry or home alarm system

Description and Main functions     
1.With WAVECOME GSM module.     
2.8 digital inputs, 2 wireless zones and  1 external power failure alarm zone.     
3.Can program open/closed alarm of digital inputs by SMS.     
4.Digital inputs are adopted optical-coupled isolators, which can prevent
  external high voltage from destroying internal components.     
5.Send SMS automatically to report the state of host everyday when host is normal status.     
6.Send SMS to 3 preset mobile phone numbers while alarming.     
7.Auto-dial 3 preset phone numbers while alarming and monitor the sound at site.      
8.You can arm/disarm and program the system by wireless keyboard and SMS      
9.You can call the mainframe at any time and listen what happened in the alarm area.     
10.Modify zone name and check status of alarm mainframe by SMS.     
11.Switch to Backup rechargeable battery when power is failure or cut by intruder.     
12.External power failure alarm: when the system checks out that there is
   something wrong with the external power or the external power is off for more
   than 2 seconds, it will send SMS to preset mobile phone immediately      
13.With password protection function     
14.Aluminum alloy casing.     
15.Can send alarm signals to monitoring center through GSM network,
   such as the police station. 
    
GSM frequency:     
SM-GSM0033A  GSM900/1800MHZ     
SM-GSM0033B  GSM850/1900MHZ (is used in Americas) 

Includes:
One alarm host (main unit)                         
One wireless keyboard                                 
One remote controllers
One siren
One AC adapter
One English user manual

Specification of main unit:
Output power: DC12V
Input power: AC110V to 220V,50Hz or 60 Hz
Working hours of standby Battery(DC8.4V):
More than 15 hours
Wireless frequency for above
accessories:315MHZ/433MHZ