ALPINAAlpina Men's AL372BB4FBS6 Quartz Black Watch

This is a very nice watch, seems very well made. Don’t understand why they made the dial so dark. To me, it’s very hard to read especially if there is any glare. And the glare reflects off the sub dials making it even harder to read!. There is also a little black box on the strap. Looks like some kind of battery. There are 4 tiny little screws that open it up. Nowhere can I find any info about it

Beautiful watch.