A study by UK-based consumer group 'Which?' has showed that technology products, including smartwatches, cameras, headphones, of unknown brands on Amazon have received five-star ratings by unverified buyers. Amazon prides itself for its authentic user reviews for products. The study says that search results for electronic gadgets are dominated mostly by unknown brands, but receive hundreds of potentially fake five-star reviews within hours of these products being listed onto Amazon. Headphones have the highest number of false reviews.