If there is a stranger through the break, lock picking and other non-normal way house, infrared alarm will sound the alarm, and the signal is transmitted to the alarm panel, send sms or a call to notice the host in time. The wireless or the wired siren will make the alarm sound sounder to let the others know.  
   Now we are research and develop a new touchalarm system, like dp-k5 , dp-k3. With the touch keypad, the popular design, pure white, especially for the wireless frequency: 868mhz and 433mhz. Not all the company can product 868mhz, FSK technology. It is support the app function, it is convenient for the people to control the alarm system via the smart phone.