[Widely Application]: Applicable for various environments, such as winery, breeding greenhouse, lizard spider tortoise terrarium tank and so on, allows you to easily know the environment temperature and humidity. [Humidity Range]: Can measure 10% to 99%, and the deviation is about 5%RH. [Temperature Range]: Can measure -50 to 70C, and deviation is about 2C. [Mini Lightweight Design]: Small digital LCD display, easy to read, lightweight and compact design to save space and easy to carry. [Package List]: Contains 4pcs black mini round LCD digital thermometer hygrometer, each one comes with the 1pc AG13 battery. [Note]: It will automatically display when the battery is installed. Please remove the battery if you do not need to use it. [Note]: It will automatically display when the battery is installed. Please remove the battery if you do not need to use it. color:black Product size: 45*15.5mm Package 4x Mini Round LCD Digital Thermometer Hygrometer 4x AG13 Battery