We used this for our camping trip. We plugged it in the DAY BEFORE we departed, because it was the first time we used it. The product took a long time to get to the desired temp. Once it did it held there well.It comes with an app. This way you can monitor it without constantly opening and closing it. After bringing everything down to freezing we left it unplugged for 2 days while camping. Nothing spoiled too include meat (which stayed frozen at the bottom). We love it!Few things:-Have someone there to help you maneuver the large package after receiving it from Amazon. It is awkward and a bit heavy.-Read the instructions PRIOR to operation.-Charging from a low battery will need approximately 9 hrs before trip.-scan the QR code, and download the app.-it is a fridge/freezer; thus, while unplugged try not to leave it open or frequently open and close it.