High Accuracy:The digital hygrometer thermometer range is from 10% RH-99% RH with +/- 5% RH tolerance; Temperature meter range is from -4 - 158 (-20 to 70) with +/- 2 ( +/- 1) tolerance. suitable for indoor,green house,wine cell,baby room,guitar room or office. Long Battery Life:The humidity gauge requires 2pcs AAA batteries which working around 12 months. (Batteries are not included). Humidity Reminder:The indoor thermometer reads data every 10 seconds; It shows the trend of Humidity:DRY /COMFORT /WET. It is not good for sensitive humans, animals, plants, etc., if the air is too dry or too wet. You will find it is very important to use an indoor thermometer to monitor the humidity and temperature of surroundings. which allowing you to react in advance, such as adjusting a thermostat or humidifier. Widely Use:Indoor thermometer ensures proper temperature and humidity control, the suitable temperture and humidity comfort our skin, allergen and other health Advantage. The indoor thermometer and humidity gauge can be placed in bedroom,baby room, nursery, wine cellar, basement, warehouse or greenhouse. Portable with Three Mounting Choices:The digital hygrometer is easily portable and has a stand for table top use/ magnet or hang on the wall if you wish to have your device attached to a household appliance! colour:black/white Material:ABS Size:79x58x24mm Package Contents:1 x indoor thermometer Only the above package content, other products are not included. Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.