Features 【Accurate Readings】This wireless indoor outdoor thermometer features a large LCD display that measures real time temperature and humidity, displaying maximum minimum records and trend arrows over the past 24 hours. 【Wide Measurement Range】The indoor temperature range is from 14℉ to 122℉ (‑10℃ to 50℃), and the outdoor temperature range is from ‑40 ℉ to 158 ℉ (‑40 ℃ to 70℃ ), with an accuracy of ±1 ℃. The indoor outdoor humidity range is from 20% to 95%, with an ac 【Easy to use】The temperature monitor comes with a magnetic back and a stand, allowing you to place it on your desktop or attach it to your refrigerator as a decorative piece. 【1 Wireless Sensor】With a maximum range of 328 feet/100 meters, you can confidently monitor your entire home. 【Monitor Your Home with Confidence】Keep track of the temperature and humidity levels in your entire home, basement, or greenhouse with this reliable electronic indoor outdoor thermometer hygrometer. Specification: Item Type: Wireless Digital Hygrometer Thermometer Material: ABS Battery Type: AAA battery x 4 (2 for sensors, 2 for monitors)(Shipped without batteries) Indoor Temperature Range: 14℉ to 122℉ (-10 ℃ to 50 ℃) Outdoor Temperature Range: -40℉ to 158℉ (-40℃ to 70 ℃) Temperature Resolution: 0.1℃/℉ Humidity Range: 20% to 95% Humidity Resolution: 1% Wireless Range: 328ft/ 100m depending on vacant space Wireless Frequency: 433MHz Backlit: Automatic off in 10 seconds Package List: 1 x Sensor  1 x Display  1 x Manual  Package List 1 x Sensor 1 x Display 1 x Manual