"Milwaukee introduces the first plumb beam laser to operate on a power tool battery, the M12 12V Lithium-Ion not included. Compatible with the M12 cordless system and delivers 75 more run time than the competition. The 2-beam plumb laser's self-leveling mechanism ensures an accurate auto plumb up to 1/4in. @ 100 feet. Does not include case. Accuracy 1/4 in. at 100 feet, Base Type Standard or magnetic, Battery Included No, Battery Type 12V Lithium-Ion, Case Included No, Laser Beam Color Red, Laser Output 1mW, Laser Wavelength 635nm, Beam qty. 2, Beam Type Line, Self Leveling Range 4, Visual or Audible Indicator Visual, Mount Type Stand alone or magnetic, Leveling Type Self."