F means that the product is rated in its category in terms of energy efficiency. The Energy Labeling system is based on EU Regulation 2017/1369/EU. F Hisense RB390N4AW1, 304 L, No Frost (fridge), SN-T, 9 kg/24h, F, White Hisense RB390N4AW1. Total net capacity: 304 L. Door hinge: Right. Climate class: SN-T, Noise level: 39 dB. Fridge net capacity: 207 L, No Frost (fridge), Multi-Airflow system (fridge), Fridge interior light, Fridge number of shelves/baskets: 3. Freezer net capacity: 97 L, Freezing capacity: 9 kg/24h, No Frost (freezer). Energy efficiency class: F, Annual energy consumption: 304 kWh. Product color: White