Professional contractors need to guarantee that the power supply is appropriate for each specific setting, and using the right transformer is critical to ensuring that all electrical components function properly. Buck boost transformers are used to convert a voltage from one value to another. They are most commonly used in computers, industrial control systems, and other applications where the output voltage may be lower or greater than the input value. When it’s used to decrease voltage, it "bucks" the voltage down, and when it’s used to increase voltage, it "boosts" the voltage up.