by 
The Curious Bag
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Security alarm systems are installed in homes or businesses in order to protect the inhabitants from burglars or other break-ins. Most security system companies provide their customers with stickers to place on various windows and doors, notifying the potential burglar that they are protected.
How they Work
Alarm systems require the user to activate them before they go to bed. Once activated, a high-pitched, loud alarm will go off if any door or window is opened.
Instant Feedback
Most alarm systems have a phone-notification system incorporated into them. If the alarm system is triggered, the providing monitoring company will immediately be notified and will then call the house to determine whether everything is all right.
Cost
The cost of an alarm system varies depending on the amount of space it will be protecting and the features that it has. However, the majority of systems ranges from $100-$300.
Negatives
Security alarm systems can create an inconvenience if unsuspecting family is in town and they try to open the window during a warm summer night.
Other Types
There are other types of security alarm systems, such as ones that are triggered in the case of a fire or excessive concentrations of carbon monoxide in the air.
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