ip66 waterproof pushbutton switch 1.easy to set up 2.voltage:24-380V 3.contact type:NO,color:transparent 4.CE, ... humidity: ≤90%Pollution degree: class 3Protection degree: IP40. IP65 Waterproof type as requestContact resistance:≤50mΩMechanica durability:momentary 1000,000 maintained ... with key,with light,self-lock,self reset,convex,waterproof... ip66 waterproof pushbutton switch XB4-BP21,spring return