... in various applications such as electric power,telecommunication, machinery, marine, textile, printing, miningindustrial equipment , and etc 3. Working ... Pollution degree: class 3Protection degree: IP40. IP65 Waterproof type as requestContact resistance:≤50mΩMechanica durability:momentary 1000,000 ... , ... dobble button,with key,with light,self-lock,self reset,convex,waterproof... 2 position stay put ...