I was just wondering if this watch is ok to wear while I'm swimming or showering? Is it going to stop working or will it rust or anything?

You actually don't need any special tools to open a screw on back. There should be special grooves on the back indicating that it's screw on instead of pop on. I use a pair of needle nose pliers ! Using the needle nose pliers straight up and down on top of the case,put the tips into the groves on either sides. Be careful to not scratch by slipping! U can use a thin peace of cloth over the back while doing this for a little protection. But that has always worked for me. Depending on how tight it's on May need quite a bit of force to break it free. I hope this helps ! Good luck ...

I need to take the back of the watch face off to replace batteries. How can I do that?

I need to take the back of the watch face off to replace batteries. How can I do that?

Harbor Freight also sells an inexpensive adjustable wrench for watch screw-backs, hopefully your batteries just press in and don't need other tools...

Harbor Freight also sells an inexpensive adjustable wrench for watch screw-backs, hopefully your batteries just press in and don't need other tools...

Harbor Freight also sells an inexpensive adjustable wrench for watch screw-backs, hopefully your batteries just press in and don't need other tools...

Harbor Freight also sells an inexpensive adjustable wrench for watch screw-backs, hopefully your batteries just press in and don't need other tools...

Harbor Freight also sells an inexpensive adjustable wrench for watch screw-backs, hopefully your batteries just press in and don't need other tools...

I need to take the back of the watch face off to replace batteries. How can I do that?