Mains supply here is 240V at 50Hz, using plug type G.
A plug adapter changes the shape of the pins and nothing else. A single-voltage kettle from a 120V country will not work safely on a 230V supply no matter which adapter you use — check the label on the appliance for a dual-voltage range before you pack it. More on travel kettles and voltage →
What to expect in the room
Kettles are standard in guest rooms, usually with instant coffee and tea. Resort and international properties more often provide a capsule machine. Bottled water is normally supplied for the kettle, which is worth using where tap water is not potable.