Currency
The official currency of Senegal is the CFA franc (code: XOF). The fixed exchange rate is
1 EUR = 655 XOF
1 XOF = 0.0015 EUR
!!! Remember to notify your bank that you will be travelling to Senegal and using your bank cards. It is likely that for insurance and security reasons, your bank will advise you to use your credit card instead of your debit card.
Avoid exchanging large amounts of CFA francs for foreign currency anywhere other than at reputable exchange offices. In Dakar, ATMs are widespread and reliable. In the rest of the country, banking facilities are few and withdrawal limits can be very low. Credit cards - after release by your bank - can be used at tourist-oriented and high-end establishments.
In the event of loss, theft or fraud involving a Belgian bank or credit card, contact Card Stop immediately (+32 78 170 170).
Internet at the hotels
Internet is included in the room rate, provided you have made reservations at the hotel of the mission.
Phones
The country code for Senegal is +221. To call cities in Senegal, dial +221 followed by the actual phone number. Senegal has good telephone and internet connectivity but roaming is expensive.Electricity
In Senegal, the power sockets are usually of type C or E. The standard voltage is 230 V and the standard frequency is 50 Hz. The hotel rooms in the Radisson Blu Hotel, Dakar Sea Plaza are provided with European power sockets.
Power socket type C 
Power socket type E
Source: www.WorldStandards.eu