The Milwaukee 12V M12 Lithium-Ion Cordless Green 360° Single Plane Laser Kit 4.0 Ah (3631-21) provides all-day runtime and the best visibility in its class. Get 30+ hours of continuous runtime when paired with the included M12™ REDLITHIUM™ 4.0 XC Battery for ultimate productivity. The high-intensity green laser offers superior visibility up to 250' (diameter) for long-range applications. The 360° horizontal plane is ideal for setting drop ceiling elevations, soffits, or easy leveling of large spaces with one tool. The tether ready lanyard hole is great for tying off the Milwaukee M12™ laser and eliminating drops. The magnetic laser level has an integrated bracket with amplified rare earth magnets for a stronger hold that will not slide on steel studs. The integrated hang hole makes setup easy and efficient in any environment. As a part of the industry-leading M12™ System, this 360° laser level is compatible with all M12™ Batteries.