Environment Friendly Use Period (EFUP) is the period of time before any of the RoHS substances are likely to leak out, causing possible harm to health and the environment.[2] Each product is labelled with a circle composed of two arrows containing a number that gives the EFUP in years; for example, a circled 10 indicates an EFUP of 10 years. A special EFUP label containing the letter "e" indicates that the product contains less than the maximum concentration value of all six hazardous subst