Aqara Temperature and Humidity Sensor T1

You can also see historical data of temperature, humidity, and air pressure values over the day – or week – in an easy to read graph. Great for making small adjustments to areas which need sensitive climate control, such as wine cellars, or wardrobes containing leather bags and shoes. This tiny, unobtrusive device comes with an adhesive pad for it to be attached anywhere. It also looks good on a table or counter. Utilizing Zigbee technology, its CR2032 battery can last up to 2 years.