Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Not a good purchase. The Buds feel heavy, you can only hear in the right bud when making inbound outbound calls, if your outside the wind in around the left bud makes it hard to hear on a call. You can only use the bud to answer a call, if you try to receive a call by accepting on your phone then you can’t hear the person calling you... too many nuances!