Power your outdoor adventure with the RIDGEMONKEY ECOPOWER USB HEATED GAS CANISTER COVER heated gas canister cover designed for all propane/butane canisters with a 440-500 size. The USB-powered heater will gently warm up the canister, so you can use it efficiently up until the last drop of gas even in the coldest temperatures. The neoprene cover is elastic and resistant to weather elements. It features an elasticated spoon strap on the side and a zippered lower section. The 5V 2A USB input is compatible with almost all the usual energy sources equipped with a USB connector.