The unit of currency is the Sri Lanka Rupee (SLR), which is divided into 100 cents. Major credit cards are widely accepted, and travellers cheques in US Dollars are recommended. ATMs are becoming more common, but outside the main cities they are unlikely to accept international cards. Credit cards should be used with caution due to the potential for fraud. Foreign currency can be exchanged at bureaux de change, banks and hotels. Banks are closed on Saturdays and Sundays.