Thank you for viewing this product. This is a temperature and humidity sensor compatible with the smartlife/tuyatumart app. By linking it to the app, it can be used with Amazon Echo (Alexa) and Google Home Assistant. You can use it to trigger actions for air conditioners, humidifiers, etc., based on the sensor's readings. It runs on two AAA batteries. I bought these in bulk for personal use, but I ended up needing fewer than I purchased, so I'm selling the extras. Because of this, the item is new and unopened. Please feel free to ask any questions or request additional photos in the comments. #Alexa #AmazonEcho #Googlehome #smarthome #IoT #smartspeaker #smartlife #thermometer #hygrometer