Product Name: Metal Push Button Switch with Light Mounting hole: 12mm, 16mm, 19mm, 22mm Max Current : 3A Matail: Brass Nickel Plating LED Colour: Red, Yellow, Blue, Green, White LED Voltage: 3-6V, 12-24V , 110-220V Waterproof Level: IP65 (16mm, 19mm, 22mm ) NO waterproof design for 12mm Customized : Yes Type: Self-Reset, Self-Locking Ring Light and Power Light Self-Reset and Self-Locking Explain: 1. Self-Reset : When you press the button, press-key will automatically return. 2. Self-Locking: When you press the button, press-key will stay until you press again. Then The press-key return. NC and NO Explain: NC : Normal Close NO: Normal OPen C? Common