This 16mm metal push button switch features a compact, durable design with an IP67 waterproof rating, making it suitable for both indoor and outdoor use. It supports self-locking (latching) function for stable on/off control, and is designed without LED lighting to meet minimalist or non-illuminated application needs. Ideal for use in doorbells, car horns, industrial controls, and other low-voltage electrical systems requiring reliable manual switching.