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.
Ordered two of this. The first one last for about 3 months, and the second one less than 2 months. Just hard to believe what can go wrong with these stuff, no moving parts, nothing changes. One day it just completely dies.