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  2. Laser pointer - Wikipedia

    en.wikipedia.org/wiki/Laser_pointer

    Red (635 nm), blueish violet (445 nm), and green (520 nm) laser pointers. A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.

  3. Wireless clicker - Wikipedia

    en.wikipedia.org/wiki/Wireless_clicker

    A speaker giving a presentation with an RF pointer in his left hand. Using a wireless clicker, helps the presenter to move freely, instead of being obliged to stay next to the computer, can get closer and keep in touch with the audience, watching the presentation together with them, being able to use the built-in laser pointer, in order to emphasize specific points in the dialogue with the ...

  4. Blue laser - Wikipedia

    en.wikipedia.org/wiki/Blue_laser

    Blue DPSS laser pointers, initial availability around 2006, have the same basic construction as DPSS green lasers. They most commonly emit light at 473 nm, which is produced by frequency doubling of 946 nm laser radiation from a diode-pumped Nd:YAG or Nd:YVO4 crystal. [ 24 ]

  5. Walmart's very best Black Friday deals of the day: AirPods ...

    www.aol.com/lifestyle/walmarts-very-best-black...

    Plus, these sheets have nearly 9,000 reviews on Walmart, where they have a 4.6-star rating. Over 7,000 of those reviews are for five-star ratings by shoppers who commented on the quality and value ...

  6. Laser safety - Wikipedia

    en.wikipedia.org/wiki/Laser_safety

    Laser pointers. In the period from 1999 to 2016, increasing attention has been paid to the risks posed by so-called laser pointers and laser pens. Typically, the sale of laser pointers is restricted to either class 3A (<5 mW) or class 2 (<1 mW), depending on local regulations.

  7. Walmart Gets Laser-Focused on Lowest Prices Again - AOL

    www.aol.com/2012/03/29/walmart-gets-laser...

    Walmart (WMT) has put out an APB for shoppers: "We have the lowest prices all the time. Period." This week, the nation's biggest retailer detailed its $2 billion plan to "reinvest" in low prices ...

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