Momentary Push Button Switch, URTONE UR126, 1NO SPST DC 36V 2A Aluminum Alloy Metal Shell with 2.8V Blue LED Ring Suitable for 12mm 1/2" Mounting Hole (Black) Momentary Type: Push & Hold - ON, Release  OFF Ring LED can be on all the time or only when switch is on which depends on how you wire it Tiny Momentary Switch: 1/2" diameter, suitable for tight space application IP65 Waterproof & IK08 Protection: Rustproof, can be used in wet or dusty environment Used widely: Great for Horn Button Switch, PC Power Switch, Kill Switch or any circuit controls