DieselMen's Armbar Stainless Steel Quartz Watch

What type of replacement battery for this watch?

Since there's no illumination on the watch that means you can't see it at night unless you shine a light on it ?

Es digital o de pila

This watch is or is not 10bar(100m or 330ft) like in the pictures and in the description atm( atmospheres)also is 100m?