Review on 🌡️ 4-Pack Indoor/Outdoor Hygrometer Gauge Thermometer - JEDEW Mini Digital Temperature Humidity Meter for Humidifiers, Greenhouse, Reptile, Plant Humidors - LCD Monitor, Fahrenheit Display (℉) by Ashley Leckie

This is great value for money. If you take the time to READ the specs, these units perform better than advertised! In my experience according to there is a 3% difference in temperature between units in the same environment and less than 1% difference in humidity. The primary focus of the units I purchased was humidity, not temperature. The units have fast response times and display temperatures up to 1/10th the temperature you input Select (F or C ), they do not switch modes As standalone devices they work as expected or better than expected, but ONLY in NON-CRITICAL applications. This is a Class 1 product with component variables between 1-10% both SMT and TH with lots of unrefined flux medium So I got a bad block. EVERYONE has a fast, friendly, no hassle, same day postal replacement policy which I think works by buying these mouths Roystvo you won't regret it! Just remember to make sure the tolerance gauge is appropriate for your app. Also, fresh batteries always increase the tolerance of devices. (Bulk LR13s are under $0.20 each).