INFINITER Red Line Generator VLM-635-ML100 (Improved Version, ideal for cutting works) The US Wall Mount Type Power Adapter is included ! Wavelength : 635 nm. Output power (Center) : Class II  less than 1mW. Dimensions: 124(L) x 54 (W) x 59 (H) mm (4.88"x2.13"x2.32"). Laser line accuracy : 40" (+/- 1mm @5m). Emitting angle: &gt; 120. 3.5~6 VDC operation. Integrated quartz cylindrical lens, collimating lens, laser diode, and APC driver circuit. APC driver circuit enables the Laser output power safe and constant.