[High Quality]: Durable Nickel Plated Brass case and Silver Alloy Contact make the switch achieve 500,000 cycles mechanical life and 100,000 times electrical life [Easy Mounting & Multiple Wiring]: Mounting Hole: 22mm/0.87in.; 4pcs of screw terminals for easy mounting; 2 wiring methods for your choice, LED light can be always on, or illuminates when the device is working [With LED Indicator]: The pure and bright LED indicator helps you find the switch quickly and judge if it is working well; LED SPEC: 15A 12V-24V Halo Ring light [Protection Degree]: IP66 Waterproof and dustproof; IK09 Anti-vandal rate. It can be used in wet or dusty environment; But Don’t immerse the button switch in water [Wide Usage]: Suitable for car, computer, instrument and meter industry, door bell, home appliance etc.