Polystar PV-SBS777WD-INV is a 520 litre capacity side-by-side refrigerator with an inverter compressor and no-frost cooling, meaning it circulates cold air without needing manual defrosting. It uses R600a refrigerant, has an energy efficiency rating around A+/A++, and includes basic interior storage like drawers, adjustable glass shelves, and door balconies. The unit usually features a built-in water dispenser, LED display or controls, and measures about W911 × D636 × H1780 mm. Its design places the condenser inside the cabinet rather than outside.