Burglar alarms have become things of common place in almost all super stores and business set ups. Private homes are not left out too far behind. Advancements in technologies and competition in the market have brought down the rates to around $10 for a basic alarm system.
How Does Burglar Alarms Work
Wired alarms are almost extinct. Wireless burglar alarms operate by either of the two means, today.
1.Connected by radio frequency
2.Connected by infra red light rays
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