What is the Bluetooth operating range? May 21, 2016 08:42 Updated The Bluetooth range between ZeRound and your smartphone is approximatively 5 meters. Related articles Can I wear ZeRound while swimming or showering? How to customize the display of my ZeRound? How long does the battery of ZeRound last after a full charge? Notifications are not working, what can I do? What does ZeRound track?