As a new buyer in the Industrial and Scientific field, we were impressed with the Channel Electronic Certificate Calibration. It was easy to use and provided accurate temperature readings. Based on our own experience this product can be a game-changer for those in the Temperature & Humidity category. The only downside was the lack of instructions provided, but WITH a simple internet search, we were able to easily find the information we needed... Overall, we highly recommend this product for its accuracy and user-friendly design..