1. This device may not cause harmful interference, and2. This device must accept any interference received, including interference that may cause undesired operation.Industry Canada (IC)This Class [B] digital apparatus complies with Canadian ICES-003 Rules.Class B Digital Device or PeripheralNote: This device is tested and complies 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 accordancewith the instructions, may cause harmful interference to radio communications. However, there is no guarantee thatinterference will not occur in a particular installation. If this equipment does cause harmful interference to radio ortelevision reception, which can be determined by turning the equipment off and on, the user is encouraged to try tocorrect the interference by one or more of the following measures:1. Reorient or relocate the receiving antenna.2. Increase the separation between the equipment and receiver.3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.4. Consult the dealer or an experience radio/TV technician for help.WEEE WarningTo avoid the potential effects on the environment and human health as a result of the presence ofhazardous substances in electrical and electronic equipment, end users of electrical and electronicequipment should understand the meaning of the crossed-out wheeled bin symbol. Do not disposeof WEEE as unsorted municipal waste and have to collect such WEEE separately.Customer FeedbackWe are striving to improve our documentation quality and we appreciate your feedback. Email your opinions andcomments to DocsFeedback@yealink.com.