... hours without power attenuation problem! Specification 1.Laser type:Ytterbium Fiber 2.Operation type:Q – switched 3.Laser power :10w/20w ... ~ 1070 6.Pulse wave frequency:20 ~ 80 KHz Applicable Materials Can be used in wood,paper,leather,cloth,organic glass, epoxy ... beverage,cloth,electronic,meter,communication instruments,package and other industries,can be combined with streamline for online marking.