... 1,Lifting force: AC 7kg , DC 32kg 2,Inter polar distance: 0~206mm 3,voltage:dc12V,ac220V K310DC AC, DC magnetic yoke ... DC 32kgPower supply voltage:dc12V,ac220VCharging: 8-12 hoursLK - 310DC (AC/DC) magnetic yoke detector powered by 12V/DC battery, artesian ... same sensitivity for small surface defects detection under the circumstances AC magnetic field. Therefore, you should use standard test-components ...