Features 1、High or low temperature and humidity alarm function, if you the current temperature or humidity exceeds the set data, the sensors will automatically alarm and you will receive the message on your mobilephone APP. 2、Data update frequency can be adjusted from 1~120 minutes according to the need, you can choose the frequency you need to use. 3、There are graphics on the APP to show you the temperature and humidity changes, and you can understand the trend of temperature and humidity changes. 4、With ℃ and ℉ temperature units conversion function. You can choose the unit to be displayed according to your needs. The switching speed is related to the set data update frequency. You can change the temperature report cycle to 1 min, then change it back after set. 5、Multiple installation methods: It can be put on the desk or hangs it on the wall. 6、If you want to achieve linkage functions, such as use with air conditioners, humidifiers, etc., you need to use a universal infrared remotes control to achieve this function. ( Infrared remotes control not included.) 7、The sensors supports Alexa and Home assistant, so you can check the current temperature and humidity by voice, free your hands. Specification This intelligent temperature and humidity detector supports WiFi and BT two connect ways, also with the powerful functions such as high or low temperature humidity alarm, date and time display functions and so on, come on and have a try, it will not let you down. Features: High or low temperature and humidity alarm function, if you the current temperature or humidity exceeds the set data, the sensors will automatically alarm and you will receive the message on your mobilephone APP. Data update frequency can be adjusted from 1~120 minutes according to the need, you can choose the frequency you need to use. There are graphics on the APP to show you the temperature and humidity changes, and you can understand the trend of temperature and humidity changes. With ℃ and ℉ temperature units conversion function. You can choose the unit to be displayed according to your needs. The switching speed is related to the set data update frequency. You can change the temperature report cycle to 1 min, then change it back after set. Multiple installation methods: It can be put on the desk or hangs it on the wall. If you want to achieve linkage functions, such as use with air conditioners, humidifiers, etc., you need to use a universal infrared remotes control to achieve this function. ( Infrared remotes control not included.) The sensors supports Alexa and Home assistant, so you can check the current temperature and humidity by voice, free your hands. Specifications: Material: ABS Color: white, black (optional) Power: 3 * AAA batter (NOT included) WiFi: 2.4G IEEE 802.11 b/g/n Temperature measurement ranges: -10℃~55℃ Temperature accuracy: ±0.3 Humidity measurement ranges: 0%~99%RH Humidity accuracy: ±0.3% RH Quiescent current: ≤30uA Package size: 75 * 75 * 40mm / 3.0 * 3.0 * 1.6in Package weight: 85g / 3.0ounce Packing list: 1 * Temperature Humidity Sensors Package List 1 * Temperature Humidity Sensors