Not able to run on just batteries evan for a few seconds, and the instructions to connect to wiff are so pour I was never able to connect.
Response from AcuRiteBy acuritepwr, acuritepwr, October 25, 2022
For full functionality, we do recommend using both the backup batteries and the included power adapter. When operating on battery power alone, the backlight is only available momentarily for 10 seconds by pressing the backlight button. We recommend reviewing the suggestions in the following link for assistance with setting up the Wi-Fi feature: https://support.acurite.com/hc/en-us/articles/360050596233-Direct-to-Wi-Fi-Weather-Station-Setup-
Actually in the last 10 years I've bought 4 of these units, two for myself and one for each of my kids. This particular unit is for my daughter and her family. I think it's not only fun to keep track of your weather data but a great motivator for kids to learn about meteorology and not to mention the educational value of setting it up. These units hold up and work well.