GCW20G: 120 Volt - 120 Watts - Max Temperature 90°F (± 5°F). Powerblanket has changed the conventional method of transferring heat to gas cylinders. This revolutionary design optimizes container pressure and increases cylinder efficiency. Powerblanket products provide a maintenance free heating solution, which eliminates the headache of maintaining critical temperatures. If heated properly, gas cylinders will last longer and be more effective. In turn, this saves time, hassle, and money. Were proud to say that this model is ETL certified to UL & CSA safety standards, giving you the ultimate peace of mind knowing youve ordered the safest and most efficient gas cylinder heater on the market!