About smartphone radio waves and USB transceiver communication

When the USB transceiver is connected to a smartphone, depending on the radio wave situation of the smartphone, radio wave interference to the USB transceiver may occur, and noise or audio dropout may occur, or connection may not be possible. In such a case, perform the following steps.

  • Move to a location where your smartphone’s signal situation improves.
  • Move the headset closer to the smartphone.
  • Flip the side of the USB transceiver that has the slide switch and plug it back in.

On the USB transceiver/Bluetooth communications

  • Because USB transceiver/Bluetooth devices use the same frequency band (2.4 GHz) as wireless LAN (IEEE 802.11ax/b/g/n), microwave interference may occur and result in noise, audio dropouts, or disabled connection if this headset is used near a wireless LAN device. In such a case, perform the following steps.
    • Change the frequency band of your smartphone and wireless LAN device to 5 GHz (IEEE 802.11ac).
      For details, refer to the operating instructions supplied with the wireless LAN device.
  • Bluetooth wireless technology operates within a range of about 10 m (32.8 ft). The maximum communication distance may vary depending on the presence of obstacles (people, metal objects, walls, etc.) or the electromagnetic environment.
  • Microwaves emitting from a Bluetooth device may affect the operation of electronic medical devices. Turn off the headset and other Bluetooth devices in the following locations, as it may cause an accident:
    • in hospitals, near priority seating in trains, locations where inflammable gas is present, near automatic doors, or near fire alarms.
  • This product emits radio waves when used in wireless mode. When used in wireless mode on an airplane, follow flight crew directions regarding permissible use of products in wireless mode.
  • When connected with a Bluetooth device, the audio playback on the headset may be delayed from that on the transmitting device due to the characteristics of Bluetooth wireless technology. As a result, the sound may not be in sync with the image when playing games or viewing movies.
  • The headset supports security functions that comply with the Bluetooth standard as a means of ensuring security during communication using Bluetooth wireless technology. However, depending on the configured settings and other factors, this security may not be sufficient. Be careful when communicating using Bluetooth wireless technology.
  • Sony shall assume no responsibility for any damages or loss resulting from information leaks that occur when using Bluetooth communications.
  • Bluetooth connections with all Bluetooth devices cannot be guaranteed.
    • Bluetooth devices connected with the headset must comply with the Bluetooth standard prescribed by Bluetooth SIG, Inc., and must be certified as compliant.
    • Even when a connected device complies with the Bluetooth standard, there may be cases where the characteristics or specifications of the Bluetooth device make it unable to connect, or result in different control methods, display, or operation.
    • When using the headset to perform hands-free talking on the phone, noise may occur depending on the connected device or the communication environment.
  • Depending on the device to be connected, it may require some time to start communications.

Note on temperature rise

  • While charging the headset units or charging case, or when using the headset for a long time, the temperature of the headset units or charging case may rise, but this is not a malfunction.

Note on static electricity

  • If you use the headset when the air is dry, you may experience discomfort due to static electricity accumulated on your body. This is not a malfunction of the headset. You can reduce the effect by wearing clothes made of natural materials that do not easily generate static electricity.

Notes on wearing the headset

  • After use, remove the headset from your ears slowly.
  • Because the headset achieves a tight seal over the ears, forcibly pressing it against your ears or quickly pulling it off can result in eardrum damage. When wearing the headset, the speaker diaphragm may produce a click sound. This is not a malfunction.
  • The long-term use of the headset may cause symptoms such as itching and irritation in the ears.
  • If you experience any of the above symptoms while the headset is in use, stop using it immediately and consult a doctor or your nearest Sony dealer.
  • For long-term use, it is recommended that you remove the headset from your ears on a regular basis.

Other notes

  • Do not subject the headset to excessive shock as it is a precision device.
  • Do not put a smartphone with the USB transceiver connected into pants pocket or other clothing pocket. A strong external force applied to the transceiver may cause deformation or malfunction of the USB port part of your smartphone.
  • The touch sensors may not operate properly if you apply stickers or other adhesive items to the touch sensors.
  • The Bluetooth function may not work with a mobile phone, depending on the signal conditions and the surrounding environment.
  • Do not breathe into the sound conduit (sound output tube) or microphone.
  • If you experience discomfort while the headset is in use, stop using it immediately.
  • The earbud tips may be damaged or deteriorate with long-term use and storage.
  • If water or foreign matter enters the headset, it may result in fire or electric shock. If water or foreign matter enters the headset, stop use immediately and consult your nearest Sony dealer. In particular, be careful in the following cases.
    • When using the headset near a sink or liquid container
      Be careful that the headset does not fall into a sink or container filled with water.
    • When using the headset in the rain or snow, or in humid locations
  • Do not drop the headset or expose it to mechanical shock. Doing so may deform or damage the headset, resulting in deterioration of water resistance performance.
  • When the charging ports of the headset units or charging case get dirty, wipe them clean with a soft dry cloth.

Cleaning the headset

  • When the headset exterior is dirty, wipe it clean with a soft dry cloth. If the headset is particularly dirty, soak a cloth in diluted neutral detergent, and wring it well before using it to clean the headset. Do not use solvents such as alcohol, thinner, or benzene, as they may damage the finish on the surface of the headset or cause other damages.

Do not use the headset units, charging case or USB transceiver near medical devices

  • Radio waves can affect cardiac pacemakers and medical devices. Do not use the headset units, charging case or USB transceiver in crowded places such as crowded trains or inside a medical institution.
  • The headset units, charging case and USB transceiver contain magnets which may interfere with pacemakers, programmable shunt valves for hydrocephalus treatment, or other medical devices. Do not place the headset units, charging case or USB transceiver close to persons who use such medical devices. Consult your doctor before using the headset if you use any such medical devices.

Keep the headset units, charging case or USB transceiver away from magnetic cards

  • The headset units, charging case and USB transceiver use magnets. If a magnetic card comes near the headset, charging case or USB transceiver, the card magnet may be affected or become deactivated.

Keep out of reach of infants

  • There is a risk that an infant may swallow the headset units or small parts. After use, store the headset units in the charging case and keep all the small parts out of the reach of infants.