"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, Beam Type Dot, Laser Beam Color Red, Mount Type Tripod or magnetic, Leveling Type Self-leveling pendulum, IP Protection Class IP 54, Interior Range ft. Up to 100, Beam qty. 3, Battery Type AA, Class Rating Class IIIa, Laser Output Locking mechanism protects inner pendulum during transportation"