User's Manual

(III) Warm Tips
The Bluetooth working distance is about 15 meters. The earbuds have been
through strictly quality testing when they leave the factory. The occasional
signal jam is related to the surrounding environment. For example, there are
many wireless signals in the surrounding environment, or there are
obstructions blocking the signal, etc. It is recommended that you try another
environment or location if signal jam happens.
FCC Warning Statement
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off