Hi friends, I have used this card many times and many more days. Sometimes many more cards at a time but I have did not practical of the effectiveness of the cards as just small bit of smoke Every where it is just an eye was in the customers eyes by the company. Good knight card used in lot of problems in the people health. Dont use good card. RESULTS : this card used in lot of problems and lot of fame this my health any this product bad. This product most of chemical and problem. So this result bad product. Friends dont use this card. U have other card used but this card dont use because this card lot of fake.Thank you.