Focusable 515nm 30mw 12V Green Laser Diode Module Line Generator for Laser Swamp Cutting Machine LocatorApplications: for Laser Level Alignment Locator for Wood Stone Sawmill Cutting Machine for Laser Swamp Haunted House Lighting Effects for laser lights in get away room Feature: wavelength 515nm output power: 30mW divergence : 0 working voltage:DC9V-12v line diameter: 1mm at 1 meter Duty cycle: 3-6 hours on, 5 minutes off lens: k9 glass lens(The line is shiny and clear) there is a ring for fix the focal length or focusable it. size: 16mm×68mm Package: 1pc 515nm 30mw Green laser line module 1pc 16mm holder