I was looking for a thermometer for my koi pond because at the onset of Neutieren a temperature of 17 ° C is recommended. Nachden the first thermometer was unfortunately defective (digital display did not show or just to flawed) I asked for a new device. This device complies with its intended tasks perfectly. Accurate and easy to read display, sensor waterproof, weatherproof unit. Perfect for use in the pond area after my initial assessment. Price / performance ratio top.