Lifetune One - the recommended coverage diameter of the effective influence of the device is ~19 feet (6m).
Lifetune Go - the recommended coverage diameter of the effective influence of the device is ~30 feet (10m).
Lifetune Flex - the recommended coverage diameter of the effective influence of the device is ~42 feet (14m).
Lifetune Zone - the recommended coverage diameter of the effective influence of the device is ~93 feet (31m).
Lifetune Zone Maxx - The recommended coverage diameter of the effective influence of the Lifetune Room is ~105 feet (35m).
True for all Lifetune devices - the closer it is to the body, the more effective it will be.