The Sparkfun Metal Pushbutton - Momentary (16mm, Red) features a durable stainless steel body and an IP65 waterproof rating, making it resistant to dust and water, thus suitable for use in various conditions. The red LED ring adds a visual element that can be beneficial in low light conditions or to indicate the status of a device.
The momentary operation type of this pushbutton means that it only remains in its 'On' state while being pressed, reverting back to 'Off' when released. This makes it a great choice for applications where a temporary action is required, such as starting a machine, triggering a process, or resetting a system.
Having a voltage range of 5-12V for the LED means that the button can be used with a variety of power supplies, offering flexibility in design and implementation. The button's branding will help you verify your voltage requirement. Please note that despite the images showing a 5V LED voltage rating, the LED's actual voltage range has been verified to be 5-12V. The communication with the supplier for updated documentation is in progress.
For detailed specifications and information, please refer to the product's datasheet.