The intricate functioning of the air conditioner requires consistent power to the compressor and PCB modules that are highly sensitive to voltage fluctuation. These components work efficiently between 170 – 270 VAC range. Any voltage supply beyond this range can cause significant damage to the compressor and control PCB that are highly expensive to repair. Specially designed range of V-Guard AC Stabilizers deliver precise output voltage (170 – 270 VAC) irrespective of any variation in the input voltage supply. Cabinet Material : ABS