Aweek&reg; G11 GSM Alarm Voice Burglar Home Security System Kit with PIR Detector/ Door Sensor/ Remote Controller/ Wired Siren, Voice Alarm System + Auto Dialing -Voice Prompt The Quad Band 850/900/1800/1900 Wireless GSM Burglar Alarm is for commercial and home use If there is any stranger breaks into its defense area. The system will call you ; at the same time, its siren will alarm loudly to scare the intruder When alarming , it will automatically notify users via mobile network about the possiable break-in using either voice calling or SMS message With its user-friendly design and without the need of fixed telephone network, it can be widely used in different locations including shops, offices , villas , residential estate, garage, warehouse