"Self-Leveling 3 Beam Laser Dot simultaneously projects 3 self-leveling beams. Magnetic base holds tight to steel framing track. Dust and water resistant. Dimensions L x W x H in. 4 3/16 x 2 9/16 x 4 1/2, IP Protection Class IP 54, Leveling Type Self-leveling pendulum, Battery Type AA, Interior Range ft. Up to 100, Beam Type Dot, Laser Beam Color Red, Mount Type Tripod or magnetic, Beam qty. 3, Class Rating Class IIIa, Battery Included Yes, Laser Wavelength 635nm10nm, Laser Output Locking mechanism protects inner pendulum during transportation"