Casio digital watches are always reliable. F91W has the green firefly light.
I have been buying the Casio Digital watches since the 1980's. I won't wear any other kind of watch. The resin bands are so comfortable and smooth to wear. Forget other watches that have that steel stretchy band that grabs and pulls the hair on your wrist. Casio watches don't do that. If your resin band cracks or breaks,
READ MORE - Reviews of Casio F91W-1 Classic Resin Strap Digital Sport Watch
I have been buying the Casio Digital watches since the 1980's. I won't wear any other kind of watch. The resin bands are so comfortable and smooth to wear. Forget other watches that have that steel stretchy band that grabs and pulls the hair on your wrist. Casio watches don't do that. If your resin band cracks or breaks,