I purchased this watch from Amazon for my son's birthday.  It failed after a few days.  While my 13 yr old could've made an issue of it, he didn't and he continued to wear it even though it was not working.  He told me he didn't want me to feel bad about the gift.  I replaced the battery thinking that was the problem.  It wasn't.  It just died.  I noticed all the rainbow and unicorn reviews for the watch by people who only just purchased the watch saying how wonderful it was.  These type of uninformed reviews are completely useless and only reflect silly commentary based upon looks as there is no basis for measuring functionality, durability, or longevity.  I meant to return this piece of junk last month and Amazon stopped selling it so as I was returning another item, I recalled the need to return the watch and much to my surprise, Amazon is selling it again.  Save your money!  It is a cool looking watch but it has had many/many problems.  I frankly expected Amazon to send a note about its many failures but it has not.  I also now see a comment about the Casio one year warranty!  So that's a bit of cya in action which supports the fact that this watch, cool looking as it is, is simply not up to either Casio or Amazon standards.  It's a 2 dollar watch that weighs about 10 grams and is made of very cheap materials. Buyer beware!