Function: white light(constant on/strobe), white light+ green laser, green laser Opersation: click: white light-constant on double click: white light-strobe press 3 seconds: green laser press 3 seconds+ click: green laser+ white light-constant on press 3 seconds+ double click: green laser+ white light-strobe Lumen:400lm Laser can be adjusted Powered by 1pcs CR123A or 16340