A balcony cabin is a regular stateroom that has sliding glass doors that open to your private balcony. Most balconies include a small table and two chairs.
You will have a bed, desk, TV, safe, closet, and an en-suite bathroom, depending on the size of your stateroom you may have either a shower or a bath. All cruise lines offer basic toiletries in your en-suite bathroom (shampoo, shower gel, soap, and conditioner) and hairdryers are normally located at your cabin desk, not the bathroom.
Most staterooms include two twin beds that can be pushed together to form a king- or queen-size bed.