Usage Tips:The ventilation holes of the product should not be submerged in water.After the product is attached to the wall, do not violently remove it to avoid damaging the product or the of the wall.Please keep away from the harsh environment of high humidity.This product is used for , not as a measuring tool.Product parameters:Product model: Multifunctional mini temperature and humidity meterBattery type: CR2032 (installed)Temperature measurement range: -50°C-+70°C (-58°F-+158°F)Temperature Measurement Accuracy: +1C (1.8°F)Temperature Resolution: 0.1C (0.2°F)Humidity measurement range: 10%RH-99%RHHumidity measurement accuracy: ±5%RHHumidity resolution: 1%Features: IndicatorHigh Accuracy and Quickly RefreshMultiple Mounting Options and Widely UseEasy To Read and Usesize: 43 x 13mmMaterial: ABScolour: WhitePackage Contents:12 x Thermometer hygrometer(Battery included)Only the above package content, other products are not included.Note: Light reflection 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.