Can be connected in parralel will comunication cable. MANUAL Input Power: 160-250V, single phase, 50 Hz 1.1kw Inlet: 40mm, 1.1kw Outlet: 25mm 0.75kw Inlet 32mm 0.75kw Outlet: 25mm Max Rated Pressure Setting: 4.8 bar @ 40 l/m Min Rated Pressure Setting: 2.4 bar @ 110 l/m Rated Settings: 4 bar @ 66 l/m, 3 bar @ 100 l/m FEATURES: Constant pressure Efficient & Energy-saving Super Quiet 100% Anticorrosive Wet End MATERIALS: Stainless steel pump body & impeller 304 welding shaft Silicon carbide to graphite mechanical seal Sensata pressure sensor Stainless steel five-way & oil pressure gauge IP54 The VFG series pump uses VVVF technology for variable speed regulation, maintaining constant outlet pressure automatically. Energy Efficiency: Saves 30%-60% energy compared to traditional methods Small footprint, high efficiency, and flexible configuration Operation: Reduces torque and abrasion on the shaft for longer pump life Eliminates water hammer effect with soft start and stop Installation and Water Quality: Easy installation, replaces traditional water supply devices Direct pressurized water supply reduces water quality pollution All parts in contact with water are stainless steel (304 or 316) for healthy water quality.