The 720ML magnetic locator can detect metallic or ferrous objects such as marker stakes, manhole covers, valve boxes and cast-iron pipe around excavation and horizontal directional drilling jobsites. It has only two controls, located at the base of the display housing, so it can be easily operated with one hand. Its easy to read digital bar graph displays signal strength and polarity to help pinpoint the target. Four sensitivity settings allow the unit to be customized to suit soil conditions. Two 9-volt lithium batteries enable more than 60 hours of operation.