1 Esthetics outward design, LCD with blue background 2 Voice instruction 3 Low-power consumption, backup battery lasts for 72 hours 4 32 wireless zones and eight wired/wireless compatible 5 Door bell, five wireless door bells 6 Low-power alarm 7 AC power failure alarm 8 Built-in siren and external siren optional 9 Six phones for auto dial 10 Remote sound monitoring, arm and disarm 11 Learning code 12 Arm/disarm each zone separately 13 Backup rechargeable battery with large volume 14 Free intercom with ademco monitoring center 15 Telephone line anti-cut 16 Three group timer 17 100 alarm record 18 You can visit http://en.chinesessg.com/showProduct_200.html for more information 19 If you are interested in this product, you can send an email to nancyshenan at gmail dot com 20 Specifications: (1) Power supply: 110 to 240V (2) Built-in Lithium battery (3) Alarm way: wireless transmitting, distance: 100m (4) Frequency: 315/433MHz