Features: This round wall thermometer and hygrometer (humidity measurement) to monitor weather condition. This garden hygrometer/thermometer accurately measures temperature and humidity simultaneously ranges between -30 and 50 °C to accommodate all climates, humidity range from 20 to RH, to keep house or garden in great condition. The decorative thermometer and hygrometer consists metal enclosure suitable for exterior mounting, you can use this garden hygrometer for a long for time without damage. This hygrometer uses a built-in mechanical movement that enables real-time sensing, so you don'for t need to calibrate it and does not require a battery. Can be placed indoors or outdoors, including baby rooms, offices, laboratories, balconies, etc. Its stylish and refined shape makes it a perfect addition to any patio, room, or garden. Specifications: Material: Metal Size: 12.5X12.5CM/ 4.9X4.9 IN Temperature range: -30 to 50 °C Humidity range: 20%-100% Package Includes: 1x Temperature Humidity Monitor note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.