Features: These digital indoor hygrometers are durable and stable, with clear lcd display designed. Small size, lightweight, will not bring burden or take up much spaces. Produced of high-quality materials, durable, simple in shapes, round, not easy to damage, and long service life . Our circular digital hygrometer display can measure indoor and outdoor humidity and temperature, so you can adjust the humidifier and dehumidifier settings according to the data to provide you with comfortable living environment. Our indoor and outdoor hygrometer thermometer tests the temperature and humidity every 10 seconds. Its temperature measurement range are minus 58 to 150 degrees Fahrenheits (Celsius: minus 50 to 70 degrees), and the humidity measurement range are 10 to 99 % relative humidity. With high-precision, it can accurately shows you the latest data. Specifications: Material: ABS Size: Approx. 45x14mm/ 1.77x0.55in Color: Black, White Package Includes: 1pc 2 in 1 Temperature Humidity Meter Detector note: 1 . Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2 . Due to the differences between different monitors, the picture may not reflect the actual color of the item.