These weatherproof/waterproof items can bear high temperatures, rain, humidity, etc and still operate perfectly. Imagine getting a mild shock when you touch the domestic bell push at your home entrance, while its raining. Watertight Bellpush would have eliminated this as they are shockproof.Generally watertight products are specified by IP (Ingress Protection) ratings and higher the number, the higher is the protection type. Common types are: