Yes, there is. Our dormitory just restricts the use of electricity and can only charge mobile phones. Once the computer and the mobile phone charging treasure were charged together, and the power exceeded the prescribed range, so we were cut off. But girls always use some curling irons and electric splints, and also want to eat hot pot and cook some porridge in the dormitory. They can't always go to the first floor to blow-dry their hair (there is a paid hair dryer on the first floor of the dormitory), so after many studies, repeated education and tour guide review, we finally succeeded! That's a transformer socket! The transformer socket I bought before is too cheap, not at all! The high-quality transformer we bought this time is really awesome! We bought the one with a maximum voltage change of 3000w W, and it is effortless to cook porridge with a small rice cooker in the morning. It's uncomfortable to blow-dry your hair in the dormitory after washing your hair. The hair dryer is a relatively high-power transformer in our dormitory, with a power of 2,200 W. When using the hair dryer, it is only adjusted to 4.