"Thermometer & Humidity Combo: Outdoor clock has built-in Analog hygrometer & thermometer combo. Automatically measures accurate Indoor/outdoor temperature degree from -40℉ to 140℉(-40℃ to 60℃), humidity readings from 0% to 100% RH. Waterproof:The Premium Rubber Gasket is around the Silent Quartz Mechanism in the back, that locked the cover fits over and sealed. The inside of glass doesn't steam up, because the clock face was be sealed as well. Elegant Design: Retro Black-Bronze frame , white dial face and large black numbers provide a good view.16"" clock face is easy to read even from a distance. It's great for mounting to patio, garden, fence, lanai, garage, screened pool, poolside, farmhouse, yard or backyard. Easy to Use:battery powered, require one AA zinc carbon battery(not included)only,(alkaline battery or rechargeable battery which may have influence on the life span of clock movement, as well as the accuracy of the time).Come with a wide slot in back for easy hanging. After-sales -365 days after-sales service and 30-day policy of free return and exchange. If any problems please feel free to contact us and we will provide friendly after-sale service for you."