Features: Monitor indoor/outdoor temperature and humidity wirelessly with this advanced hygrometer, featuring a large color screen, customizable temperature unit display, and real time comfort indicators for precise environmental tracking. Engineered with a plastic casing and clear temperature trend arrows, it records values, offer 12/24 hour clock option, and alerts users when indoor conditions suggest optimal window opening moments. Ideal for homeowners, gardeners, and weather enthusiasts needing data for greenhouses, basements, or living spaces to optimize HVAC efficiency and prevent moisture related damage. Perfect for monitoring baby rooms, wine cellars, workshops, or vacation homes, providing updates on environments ranging from 40°C to 60°C ( 40°F to 140°F) with 20% 95% humidity accuracy. Simplify climate management with its wireless sensors compatibility, easy to read color coded comfort zones, and easy setup. Specifications: Component:ABS Indoor temperature display ranges: -9.9 ℃~+50 ℃&14 ℉~+122 ℉ Indoor humidity display ranges: 20% to 95% Outdoor temperature display ranges: -40 ℃~+60 ℃&-40 ℉~+140 ℉ Outdoor humidity display ranges: 20% to 95% 2. Resolution: 0.1℃ & 0.1℉, 1% Power Supply methods: 1.5V Battery(not included) Color:White,Black Package Includes: 1Piece Thermometers Host 1Piece Sender 1Piece Instruction note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.