Amazon calculates a product's star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers and factors that establish reviewer trustworthiness.
2.0 out of 5 starsProduct appears good, the one I received was defective
Reviewed in India on 6 October 2019
Product was not working from the very beginning, even replaced item was also like that. The seller is either negligent or dishonest. Maybe it was a product returned by other buyer, but quality check before despatch saves time and effort.