Customer Reviews

4.92 out of 5
See all 53 reviews
Write a Review
  • All Reviews (53)
  • Image (4)
  • Video (0)
  • All Star
    • All Star(53)
    • 5 Star(49)
    • 4 Star(4)
    • 3 Star(0)
    • 2 Star(0)
    • 1 Star(0)
Sort by:
Top Review
  • Top Review
  • Most Helpful
  • Most Recent
Reviews only from your country (United States)
|
Show Original

A part of the review has been auto-translated.

  • 15/12/2020

    Obrigado Banggood

    Comments
    Show Original
  • 28/03/2018

    Blue wire - Clear wire + keep your fingers away from the arc. maybe put a plier or something conductive for the arc to short toward. hope this helps anyone:)

    Comments
    Show Original
  • 19/08/2019

    Very excellent and high quality

    Comments
    Show Original
  • 05/01/2019

    Il est vraiment petit !!! et marche fort !

    Comments
    Show Original
  • 16/03/2018

    This is a neat little high voltage generator. Says about 800KV + but be careful of not shorting output leads directly use a high value resistor to draw sparks (about 10 meg or so ) and not for more tan 30 seconds otherwise you will cook the module. Negetive item leads are not marked for input volts 3.7 to 7.4 max and HV output leads, no instructions as usual but look at photo with a good monitor or printer for colors.

    Comments
    Show Original
  • 30/09/2019

    I sure would not feed anything close to 7 1/2 V at 4 A into this thing… I’m sure it would kill it. Having said that, even with an input closer to half that, you still get a good long bright spark, and a wicked loud snap. You could probably get usable output by powering it with no more than a USB rechargeable power supply. Running one output through a large diameter needle and aimed at a little aluminum grid connected to the other output, about an Inch and a half away, I-got a nice flow of negative ions that I could feel with my hand, and the smell was immediately noticeable. I think the best way to get a good gap distance is to get it hooked up and slowly move the grid towards the needle until you can see a nice purple corona at the very tip of the needle. Much easier to do in the dark, obviously. That’s what I use these for, as I have found that it really does make a difference in the air quality, removing stale odors, reducing dust, and I totally agree with the research that has shown that people work better, become less fatigued, and generally have a better mood when there are plenty of negative ions in the room. It just adds a freshness and purity to the air that I find very pleasant. In fact, I think this subject is under researched… I wish someone would do some controlled studies to see if food in your refrigerator in the dark would stay fresher longer, and mold would be held at bay with a combination of negative ions, and a UV light that came on intermittently when the door was closed.

    Comments
    Show Original
  • MaxVIP3
    IT
    10/02/2018

    la polarità dell'alimentazione non è evidenziata. I due cavetti che dovevano essere rosso e nero sono trasparenti e molto simili tra di loro. uno è completamente trasparente e l'altro appena celeste. mi spiace togliere una stella su "qualità" ma è una leggerezza non da poco.

    Comments
    Show Original
  • 07/07/2018

    the product arrived without any manual or installation guide, so I was not able to use it. I am very sorry for this, bat but since the use of the other voltage is very dangerous, I preferred to avoid possible accidents.

    Comments (1)
    Show Original
  • 16/05/2018

    Tested with one 18650 cell,and functions properly.Amazing for such a small item. Money well spent.But I do not understand the paches of lacker on the outside,as if someone dropped it on a table full of lackerspots.

    Comments
    Show Original
  • 22/03/2018

    Item arrived in what appeared to be, good condition, but when power was applied per sketch, the unit was dead.. I will order another, and still give seller a good review. Sometimes these kind of units are non-functional. I don't place blame on the seller.

    Comments
    Show Original
Show:

    Total 0 pages

    Go to page

    Go

    You might be interested in

    recommendation for you
    • US$3.99
    • US$21.99
    • US$6.47
    • US$17.99
    • US$14.99
    • US$5.39
    • US$5.99
    • US$6.99
    • US$17.99
    • US$25.99
    • US$5.99
    • US$1.49
    • US$11.21
    • US$3.99
    • US$4.99
    • US$3.69
    • US$4.79
    • US$13.99