INFINITER ML-200G Green Line Generator, 2018 version (Ideal for cutting works) The US Wall Mount Type Power Adapter is included! (Operating temperature range : -4 &deg;F ~ 140 &deg;F) Operating Temperature Range: -4 degrees Fahrenheit to 140 degrees Fahrenheit (-20 degrees Celsius to +60 degrees Celsius).Wavelength : 520 nm. U.S. version - Output power (Center) : Class IIIa  less than 5mW. Dimensions: 4.88"(L) x 2.13" (W) x 2.32" (H) ( 124 x 54 x 59 mm ) Weight: 10 oz. Laser line accuracy : less than 3mm at 5 meters. Emitting angle: more than 120. Housing: Metal. Finishing: Black anodized. Integrated quartz cylindrical lens, collimating lens, laser diode, and APC driver circuit. APC Driver Circuit enables the Laser output power safe and constant. Mean time to failure (MTTF) 77F: 10,000 hours. Integrated industrial use green laser module has 10,000 hours working life.