The unit of currency is the Kenyan Shilling (KES), divided into 100 cents. It is not advisable to take Kenyan Shillings out of the country, as they are difficult to exchange elsewhere. Travellers cheques in Sterling or US Dollars are recommended for your trip to Kenya. US Dollars in particular have become commonly used in many of the country's main hotels and safari lodges. Foreign currency can be changed at banks, bureaux de change and hotels; easiest to exchange are US dollars, pounds sterling or Euros. Street exchange merchants should be avoided as they are operating illegally. Banks open Monday to Friday from 9am to 3pm and on the first and last Saturday of the month. Banks and bureaux de change at the international airport stay open 24 hours. Credit Cards (American Express, Visa and MasterCard) are accepted in the larger hotels and stores, and some camps and lodges. ATMs are widely available in Nairobi and the major towns.