flush spring return pushbutton switch 1.manufacture factory ... voltage:≤380V AC or ≤220V DCAmbient air temperature -25°c~ +40°cAltitude: ≤2000mRelative air humidity: ≤90%Pollution degree ... 36*29*24.5mm 5.Other modles for reference:flush head,mashroom head,spring return,turn release,turn ... light,self-lock,self reset,convex,waterproof... flush head spring return pushbutton switch,XB2-BA31