... you add oil one time.Safety,no toxic, environmental protection.How to use:1.open the cover of warmer2.put it up lightly ... efficiency is high.With a nice surface,easy to carry.Long time to devise,use for many years.Use area is large, suitable for men ... Essential Oil,or kerosene,don’t use gasoline, alcohol and other oil,or else platina catalyst easy to damage.Don’t put the ...