... power. Because of its small volume, light weight, LK310DC AC, DC magnetic yoke detector uses battery or ac220V directly ... 0 ~ 206mmLifting force: AC 7kg , DC 32kgPower supply voltage : dc 12V,ac 220VCharging: 8-12 hoursLK - 310DC (AC/DC) magnetic yoke detector ... same sensitivity for small surface defects detection under the circumstances AC magnetic field. Therefore, you should use standard test- ...