Detailed Product Description Rotary laser is one type of integrated instrument of light, mechanism and electricity, you may have easy measurement or set of a level reference surface by it's auto rotating laser beam. It is widely used in the construction work or measurement both in door and out door Contents: 1 pc Rotary head 1 pc tripod 1 pc DC adaptor 1 pc red protection goggle 4 pcs 1.5V (AAA) ...