A means that the product is best rated in its category in terms of energy efficiency. The Energy Labeling system is based on EU Regulation 2017/1369/EU. A Bosch Serie 4 WAN2427ZFR, Front-load, 17.6 lbs (8 kg), B, 71 dB, 1200 RPM, A Bosch Serie 4 WAN2427ZFR. Loading type: Front-load. Drum capacity: 17.6 lbs (8 kg), Spin-drying class: B, Noise level (spin): 71 dB, Noise level (wash): 51 dB, Maximum spin speed: 1200 RPM. Product color: White. Width: 23.5" (598 mm), Depth: 23.2" (590 mm), Height: 33.3" (845 mm). Energy efficiency class: A