To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Look wise it's nice . But what I got is two different types of earnings. One with screw and without screw type. One with screw type was very bad and it came off . My husband is using only one earning without screw which is good. Dont cheat the people like this. How can two differnt type of earnings can be given. Can't u check properly. It's very high in cost also. Very bad of Amazon .