Three different heating settings
·Red --- High temperature --- 150 °F (use time is about 2-2.5 hours)
·Green --- Medium temperature --- 130°F (use time is about 3-3.5 hours)
·Blue --- Low temperature --- 110 °F (use time is about 6-6.5 hours)
Three heating settings allow you to adjust different temperatures in different situations to provide the suitable warmth.