Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
I've opted for international express and received the thermometer in 3 business days. The reading is quite accurate as you can see from the picture, I've used the AKID thermometer on the forehead and the standard Terumo thermometer on the underarm. Both of them have the same reading. Thumbs up!
Bought the item because i needed a thermometer and due to the positive feedback. However, despite the long wait, the thermometer i received is totally different from the description. And even different brand.