[Video] This Amazing Laser Will Protect Your Home. Cost Under $20.

Lasers don’t spread out like the light in flashlights or light bulbs do. The light travels in a straight line, and can travel long distances without losing much energy.

When the light beam is breached, the sensor stops receiving the light for a brief moment, it then sends a signal to the alarm to activate.

Protect your home with lasers. Here is an easy to make, low cost laser beam security system for under $20!

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