A 4-bedroom dual-key unit in Singapore typically includes smart home devices (smart lighting, air-conditioning control, smart plugs, digital locksets), fully equipped kitchens (refrigerators, ovens, microwaves, dishwashers), separate living areas with additional kitchenettes or utility rooms, washing machines, dryers, and sometimes luxury appliances like wine chillers. Development-specific features may include communal gardens, swimming pools, a clubhouse, a barbecue pavilion, and a gym.