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 How to reset manually my ZeRound? What is the approximate Bluetooth range? Can I wear ZeRound while swimming or showering? How long does the battery of ZeRound last after a full charge? My ZeRound is not charging, what should I do?