This item had an issue with the #1 key right out of the box. Unfortunately, I purchased it in August and I didn't get a chance to return it in time so I'm stuck with it now. I also purchased one of these in July of last year, and it completely died with no reason or warning. It wasn't dropped or abused in any way, just completely stopped working, even with new batteries. That's what led me to purchase this one, which adds a "1" to the numbers you're typing in if you hit any of the numbers close to the 1. It also seems to omit numbers that you feel like you've typed, so the keys on this one are very inconsistent and temperamental. Technically it works, but not great.