It is ok
This does not hold a charge well. But when it is plugged in to an outlet works well, I don't like that you have to keep setting the timer over and over again. It says will stay for 18 hours but in reality only 3-4. I got it to use for my daughters insulin to stay cold while traveling. I thought I could charge it with a USB battery pack but it killer the battery in seconds when it was fully charged. I can plug in my car but it too does not have enough to keep it charging and cold.
Rating: 2 stars