This blanket is an effective way of retaining liquid in your keg or keg. It's easy to use and features buckles and straps for secure positioning. Turn it on and it heats up quickly. The thermostat is preset and cannot be adjusted. no power button. To turn it off, you must turn it off. It's durable and seems to heat up evenly and consistently. So far it has worked reliably and I am happy with its performance. I wish it had a power switch/light and an adjustable thermostat. But you can do without her too. It contains several bound pages with warnings and instructions. They contain photographs. Instructions in three different languages: English, French and Spanish.