For downloadable PDF instructions for your 40Nine 3-Hand Watch, Click HERE
For downloadable PDF instructions for your 40Nine Chrono Sport watch, Click HERE
Please refrain from changing the battery in your 40Nine watch yourself. You may either bring it to a local reputable jeweler who can properly seal the case back to it's original position after the battery is changed. You may also send the watch to us for battery replacement:
5016 Schuster Street
Las Vegas, NV 89118
Please include a note describing the issue you are having with your watch and your return address, as well as your phone number in case we need to reach you.