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.
Purchased this system to put throughout the house for my ill wife was very easy to set up and clear voice communication . The call button also allows me to know my attention is needed without speaking. Highly recommend this system.