• Always store the headset with the power off and safely protected.
• Do not expose this device to temperatures outside range of -10° to 40° for operating and -20° to 50° for storage.
• Avoid using the headset for too long and/or with high volume, this may affect the hearing. • Use a recommended adapter to charge.
• Dispose of batteries according to local laws & regulations. Please recycle if possible. Do not dispose of the batteries as household garbage or into the fire to avoid explosion.
• Do not attempt to remove or replace the battery on their own. Such operations may damage the device

Common part: 

This equipment complies with radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

U.S. FCC Part 15 Regulatory Information

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Note: 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 and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Canada Regulatory Information

This device complies with Innovation, Science, and Economic Development Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2)this device must accept any interference, including interference that may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d’Innovation, Sciences et Développement économique Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes : (1) l’appareil ne doit pas produire de brouillage, et (2) l’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement.

The device is compliance with RF exposure guidelines, users can obtain Canadian information on RF exposure and compliance.

Le présent appareil est conforme aux directives d’exposition RF, les utilisateurs peuvent acquérir les informations correspondantes sur l’exposition aux radiofréquences et sur la conformité de l’appareil.

Canada Regulatory Information

Support Frequency Bands and Power:

• BT_BR+EDR < 2dBm
• BT_BLE < 2dBm

The simplified EU declaration of conformity referred to in Article 10(9) shall be provided as follows: Hereby, [Grandstream Networks, Inc.] declares that the radio equipment type [GUV3050] is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: www.grandstream.co