Bosch GCL 2-15 Professional Digital Laser Level (2017 model) Laser diode 630  650 nm, &lt; 1mW Working range 15 m Laser class 2 Projection 2 lines / 2 points Detail link : http://www.bosch-professional.com/middle-east/en/combi-laser-gcl-2-15-225519-0601066e00.html