Hotels in the United States basically have hair dryers, but hotels in the United States require environmental protection, so there is no toothbrush, toothpaste and slippers, which you need to bring yourself; The power supply in the United States is also different from that in China, but if you just charge the camera and mobile phone, you can use it directly without buying another power adapter. Everyone can only bring 5 thousand dollars into the United States. If it exceeds this amount, it is necessary to declare, one cigarette per person and one bottle of high-alcohol per person; When you fly in the United States, you are not allowed to lock your checked baggage. If your checked baggage is locked, it is likely to be pried open by the airport, so you should carry valuables with you. The weather in all parts of the United States is different. Hawaii, Los Angeles and Las Vegas I went to were particularly dry and hot, and my skin was sunburned. I suggest you take more sunscreen and hydration. Chicago is better and wetter than these places, so I don't know about other places. It's best to swipe your credit card in the United States. If you don't have a credit card, you can apply to the bank for a new card with the VISA logo, so you can swipe it in the United States, and you have to open a commission to purchase foreign exchange, otherwise it won't be used; I suggest you keep everything simple when you go to the United States. You can buy it in the United States, and the price is relatively cheap at home.

I can't think of so many others now. Please leave me a message if you want to know anything else. Have a good time in America!