To calculate the overall star rating and percentage breakdown by star, we do not 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.
Item was mailed in a non-padded envelope and was received with the packaging box crushed. Thermometer works fine though. This is the third one I purchased and it does not come with a battery like the one I purchased from Amazon USA site.