This Magnetic Crack Detector is versatile - Articulating legs allow these crack detectors to conform to virtually any surface configuration. They can also be used to demagnetize components. This Magnetic Crack Detector is Portable - Designed for one-person operation, these crack detectors are lightweight and can be taken to the worksite in their protective case. No transformer box to drag around. This Magnetic Crack Detector is Powerful - All of our magnetic crack detectors produce a strong AC magnetic field that is applied to a precise area for fast, reliable inspection. Units have a 50% duty cycle (for example, 2 miutes on, 2 minutes off). This model generates 10 pounds of pull and is available in 115V and 230V models. The 115V model pulls 4 amps and the 230V model pulls 3 amps. All Goodson Magnetic Crack Detectors carry a full 1-year Manufacturer's Warranty for repair or replacement.