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Why a red laser is not as visible as a green one does? Here’s a comparison between red lasers and green lasers.

Are you interested in laser pointers? Do you feel confused about which kinds of laser pointers should get? Well, here are some general ideas about laser pointers, for your reference.

Looking for a DV camera for insurance protection, spy needs, life blogging, or ultra portable camcorder for keeping important memory stay with you all the time? Don't miss this World Smallest High Resolution Mini DV Camera

Undoubtedly, its core "Operation System" becomes one of the decisive factors to win the smart phone battle. So what OS are very popular now? What are their differences? Here will give you some clue.

Why use signal Jammer? Sometimes, many of us have a particular need for privacy, want to enjoy truly peace of mind or protect the confidential we discuss. Signal jammers could effectively keep us from the disturbance from cell phones, GPS Location, Spy camera…

Why there are invisible? They have colors and shapes – we could touch them by our hands. Why we don’t notice such gadgets? Pinhole spy cameras are either invisible to the subject…