NIRVANA micro inverter series Rand oil-free screw compressor (37-160KW) a detailed description: the perfect combination of hybrid permanent magnet motor l revolutionary technology and variable speed drives, currently has the only true sense of tone speed variable frequency drive system air compressor l patented hybrid permanent magnet motor is directly connected to the host, no motor bearings l continued operating efficiency more than 95% l use 380V / 3Ph / 50Hz Power Inverter l IntellisysTM integrated energy-saving controller, SG controller unit l Noise level: 68-75 db (A) l Dimension (mm): 37-45KW 1345 L x 1579 W x 1777 H 55-75KW: 1803 L x 1346 W x 1956 H 90-160KW: 2556 L x 1831 W x 2440 H l Unit Weight (kg): 37-45KW: 1048 55-75KW: 1531 90-160KW: 3175