There is a 110 volt socket,so buy an adapter,there is no laundry but you can get any articles washed for you at a cos.
Just to add to the previous answer and maybe clarify it a bit, there is a 110V socket but it is for an American plug, the Destiny being an American ship in an earlier lif.
Yes there are electric sockets in the cabins, but unfortunately no laundry rooms . However, there is a laundry service available with cabin stewards chargeable to your onboard account, should you need something cleaned or pressed. Make sure you take something warm with you e.g a fleece/ long trousers. We needed ours on January trip this year.Hope you won't need them but better to be prepared for anything so that you can still enjoy your holiday, especially as the 24 hour restaurant is exposed to elements.
The voltage in the cabins on the destiny is 110 and you need an american flat pin adaptor. There is no laundry but you can send things to be cleaned which is quite expensive. You aren't allowed to use irons in the cabin either.