... 1.easy to set up 2.voltage:24-380V 3.contact type:NO,color:transparent 4.CE,CCC approve XB4 ... two NO, 4-two NC, 5- NO+NC3. Only land contact-replacement: Example:SB2-BE10_, _ enter figure:1-NO, 2 ... .5mm 5.Other modles for reference:flush head,mashroom head,spring return,turn release,turn to stay up, ... dobble button, ... reset,convex,waterproof... ip66 waterproof pushbutton switch XB4-BP21,spring return