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. | Silent Mechanism: non ticking, quiet sweep second hand ensure a good sleeping and work environment. clear display and easy to read time with large number inside,Perfect clock for hanging outdoors or indoors, dining rooms, living rooms, family rooms, bedrooms, kitchen，analog ambient dual temperature (℉&℃) | 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 - If you have any questions or need assistance with our product, Please feel free to contact us and we will provide friendly after-sale service for you. Note: Before use, please assemble all the accessories to ensure the clock works effectively.