User Manual: http://m5.img.dxcdn.com/CDDriver/CD/sku.248109.doc It is a mobile communication technology security product which supports SMS and dialing alarm and can store 6 groups of phone numbers and 2 groups of message numbers; When alarm sounds the system will auto send out phone numbers and alarm messages; SOS fire gas door window balcony and surrounding place alarm; Great item for intelligent household security. Material Plastic Brand NA Model SN-9100 Color White+Black Quantity 1 Power Supply 100-240v Remote Controlled distance 1000M Voice Decibels 110dB Battery Type Dry Cell Certification CE Keywords GSM SMS Home Burglar Security Alarm System Detector Sensor Kit Remote Control Other GSM frequence:850/900/1800/1900; Usage:personaldoorwindowsmoke; Back-up Battery: NI-HI AAA*6 DC7.2V; Siren Volume: 110dB; GSM Frequency: 85090018001900MHz; Wireless frequency: 433 MHz; GSM Control Panel; Input Voltage: DC12V/1.2A; Standby Current: <55mA; Alarming Current: <450mA; Wireless Frequency: 433MHz; GSM Frequency: 850/900/1800/1900MHz; Sensors: can store Max. 99 wireless sensors; Remote Controllers: can store Max. 8 wireless remotes; Wired Sensor: can connnect Max. 7 wired sensors; Back-up Battery: can last 4 hours when power cut off; Siren: only support one wired siren OR more wireles sirens but with same transmitter; Wireless Gap Detector (Door / Window Contact); Power Supply: DC12V/23A Battery; Static Current: 20 mA; Transmission Current: 15mA; Transmission Frequency: 433MHZ