Usage:Personal Color:black Wireless frequency:433MHz GSM Frequency:Quad-band 850/900/1800/1900MHz Language support:English/Frech/Russia/Spanish/Italy Backup Battery:Lithium Battery 7.2V Alarm loudness:110dB APP support:Supports IOS/Android App Control Defense zones:99 wireless zones (8 zone types) and 2 wired zones Accessory support:Maximum support 150 remote control and 150 sensors Show More