CurrencyThe official U. S. currency is the United States dollar ($), divided into 100 cents (¢). Airports, People's Foreign Exchange and banks can exchange foreign currency, better rates can usually be obtained at airport and passenger information center. MasterCard, Visa and American Express also be used.
ATMs service 24-hour and its easy to found. Most ATM per transaction will be charged $ 2. 5 or more service fees. If you use an ATM that doesn't belong to your own bank may also be an additional charge. Use a credit card at an ATM cash withdrawal will usually withheld large sums of money, please contact your credit card company in advance to confirm.
Businesses generally accept American Express and Visa traveler's checks. If you want to take it, please use the dollars to buy.
Also note that the micro-transaction may be rejected by the face value of more than 20 bills, the best way is to prepare some change.