Extremely low noise levels of 65 dB(A). 230 volt & 400 volt variants. Two Year Warranty On Pump T&C Apply. Portable. Genuine B2800 pump. Belt driven lubricated. 2Hp & 3Hp models available. Modern, Compact design.This noise reduction was achieved by enclosing the machine in a Sound proof cabinet with special Sound abSOrbing panels, taking care of ventilation And, on Some models, using special intake silencers.