Max warmer is very powerful, it’s powered by a lithium battery and 4 ceramic heating elements inside . It can change electric energy into heat to warm, last for 10 hours at most. The heat is control by temperature sensor, it can stay between 42°C to 50°C, which is comfortable to warm people. Max warmer has 2 parts, main body and extended body. 2 parts are connected by magnets, very easy to combine or separate, and 8 metal contacts transfer the energy between them. Main body is very portable to take out, it can warm hands, and it is also a power bank, which can charge digital devices when necessary. When go back home, 2 parts can combine together to become a larger warmer, twice the size, twice the heat, twice the enjoyment. It can warm feet, warm stomach, warm bed, warm mask, etc.