These are small LED lit metal flush-style push buttons, each item you buy is one button, you need to choose the style you want, I have the below…
These are small buttons, the momentary variety are ok for my adult sized fingers, the latching ones require a considerable press to get down far enough (still can do it, just not entirely comfortable), it would be better with a poking stick or kid sized fingers – which might be an advantage.
Each button is lit by LED, the voltage for the LED without any external resistor, 3-6v.
If you want to use a 10-15v supply (eg 12v in a car) then simply putting a couple of 1k resistors in series with the LED should work nicely – if you ask me I can include suitable 1k resistors for you.
The switch does not control the LED, that is up to you to do how you want to do it.
The connection/length of the back of the switch varies batch to batch, see photos for detail.
Hole size 12mm should do it, maybe 12.5, the bezel is approx 14mm diameter.
I do not have current or voltage specifications, typically this sort of switch you keep to 30v or so max (remember the LED is 6v max) and use for low current maybe 1 or 2A at the very most (really you would use this to switch a relay or transistor not the main current).
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