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.
Despite what you think these little nail dryers put out a good amount of air to dry. I keep them in my nail polish case, small enough for travel. I bought a electric plug to make mine work, but I'll use the batteries for travel. Great product!!