cheap and muliti-functional, be adapt for middle-sized houses 

outstanding features:

1.      8 defense zones; Password protection

2.      Wireless-learning remote control, and other detectors

3.      Program the duration length of the siren. 

4.      Time delay to arm/disarm

5.      Telephone line anti-cut function

6.      Record your own personal message for ten seconds

7.      Up to 6 telephone numbers can be pre-stored in the unit and dialed to summon help in priority order.

8.      Remote command and access to the system from anywhere via a telephone/mobile

9.      Emergency/panic button is available for 24 hours whenever arm/disarm

10.  Back-up rechargeable battery available for 36 hours when power is in failure

11.  Able to link up to the networks of alarm center through an ID code