Intelligent digital thermometer hygrometer: the digital mini hygrometer has 3 symbols. A Smile is displayed when the humidity is between 30% and 60%. Indicates water droplets when the humidity is 30% or above 60%, indicates dryness or humidity so you can adjust your humidifier or dehumidifier accordingly and always live in a pleasant environment.Temperature monitoring: -9.9C ~ 50C. Temperature measurement accuracy: 1C, Temperature resolution: 0.1C (C) Select C/F with of a button, update the thermometer inside measurement data 10 seconds.Hygrometer Inner: 10%RH ~ 99%RH Humidity Resolution: 1(RH), Humidity Measurement Accuracy: 5%RH (1C/% RH difference between two thermometers can display, is normal)The thermometer/hygrometer is suitable for use in homes, bathrooms, children's rooms, warehouses, cellars, greenhouses, offices, farms, storage rooms etc. The thermometer is powered by 2 x 3AAA-7 (not included) and has a standby time of up to one year.Proudct Size: Small and portable design with a screen so that you can read and move the device from location to location.Colour:BlackMaterial:ABS Size:80 x 59 x 23mmPackage Contents:2 x thermometerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.