Q81C Mechanical Hygrometer/Indoor Thermometer Outdoor Humidity IndicatorOOTDTYoottyFeatures: this round wall thermometer and hygrometer (humidity meter) to monitor weather conditions. This garden hygrometer/thermometer accurately measures temperature and humidity simultaneously between -30 and 50°c to accommodate all climates, humidity range from 20 to 100% relative humidity to keep your home or garden in top condition. The decorative thermometer and hygrometer is composed of a metal case suitable for outdoor installation, you can use this garden hygrometer for a long time without damage. This hygrometer uses built-in mechanical motion that enables real-time detection, so you don't need to calibrate it and it doesn't require batteries. It can be placed indoors or outdoors, including children's rooms, offices, laboratories, balconies, etc. Its stylish and sophisticated shape makes it the perfect addition to any patio, room, or garden. Specification: Material: Metal Size: 12.5X12.5CM/ 4.9X4.9 inTemperature Range: -30 to 50°cHumidity Range: 20%-100%Package Included: 1x Temperature & Humidity GaugeNote: Please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.