C 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. C Candy Smart CSS4127TWR3/1-11, Front-load, 15.4 lbs (7 kg), B, 79 dB, 1200 RPM, C Candy Smart CSS4127TWR3/1-11. Loading type: Front-load. Drum capacity: 15.4 lbs (7 kg), Spin-drying class: B, Noise level (spin): 79 dB, Maximum spin speed: 1200 RPM. Product color: White. Width: 23.6" (600 mm), Depth: 17.7" (450 mm), Height: 33.5" (850 mm). Energy efficiency class: C