YAMAHA TW-EF3A Headphones and Earphones User Manual

TW-EF3A
True Wireless Earbuds

Model No….
Serial No…
Safety Guide

TW-EF3A Headphones and Earphones

Label information
The model name (part number), power requirements and so on for this product are found printed at the location shown in the illustration. You should note this serial number in the space provided below and retain this manual as a permanent record of your  purchase to aid identification in the event of theft.

PRECAUTIONS

Please read these precautions carefully before using this product.

Points that must be observed
Be sure to carefully read and observe the following precautions to avoid harm to yourself or to others, as well as damage to your personal property.
After reading, please keep this document readily available for anyone who uses this product.

• For inspection or repair, please contact one of the following customer centers.
  – The store where you purchased the product
  – Yamaha dealer

• This product is intended for use as a general household device. Do not use it in any field or activity requiring a high degree of reliability in regard to human lives or valuable assets.

• Please note that Yamaha accepts no liability for any losses resulting from improper use or unauthorized modification of this product.

WARNING
These precautions alert you to the possibility of death or serious injury to yourself or others.

Handling

• Do not use this product while driving or cycling. Also, do not use this product when you need to hear what is going on around you, such as at a railroad crossing or construction site. Reduced ability to hear surrounding sound increases the risk of an  accident.

If you notice any abnormality

• If any of the following abnormalities occur, stop using this product immediately.
  – Unusual smells, sounds or smoke coming from the product
  – An unusual amount of heat from the product
  – Cracks or damage to the product
  Continuing to use the product as-is may result in burns, injury, fire ignition, explosion, fluid leakage, electrical shock or malfunction. Have the product inspected or repaired immediately.

Charging

• To charge the charging case, connect it to the USB port of a commercially available USB power adaptor (5 V DC, min. 0.5 A output). Incorrect connection may cause a fire, explosion, fluid leakage, electric shock or malfunctions. For details on charging, refer  to the User Guide.
• Charge this product within the specified charging temperature range. Charging at a temperature outside this range may cause a fire, explosion, fluid leakage, electric shock, or malfunction. Charging temperature : 5 – 40 °C
• Use the included charging case to charge the earbuds. Using a charger other than the included charging case may cause a fire, explosion, fluid leakage, electric shock or malfunction.
• Use only the supplied USB power cable to charge this product. Do not use the supplied USB power cable for other devices. Failure to observe this may cause a fire, burns, or malfunction.
• Do not cover the product with blankets, clothing or similar materials while being used or charged. This may cause overheating or ignite a fire.
• Never charge this product when it is wet. This may cause a fire, explosion, fluid leakage, electrical shock or malfunction.

Battery use

• Do not dispose of batteries in a fire or hot oven, or mechanically crush or cut the battery.
  Doing so may cause an explosion.

• Do not leave the batteries in a place with extremely high ambient temperature. This may result in an explosion, or cause the flammable liquid or gas to leak.

• Do not subject the batteries to extremely low air pressure. This may result in an explosionor the leakage of flammable liquid or gas.

• Do not drop this product or apply any strong impact to the product. Failure to observe this may cause a fire, explosion, fluid leakage, electric shock or malfunction.

Do not disassemble

• Do not disassemble or modify this product. Failure to observe this may cause a fire, explosion, fluid leakage, electric shock or malfunction.

Water warning

• The charging case and included USB power cable are not waterproof.
  Do not use these products in damp or wet conditions, such as in a bathroom or rainy outdoor location. Also, do not get the products wet with sweat, rainwater or seawater.
  Liquids such as water or foreign matter that get into these products may cause a fire, explosion, water leakage, electric shock or malfunction. When charging, make sure that the earbuds are not wet. If they are wet, wipe them off with a soft, dry cloth.

• Do not handle the charging case with wet hands. Failure to observe this may cause fire, explosion, fluid leakage, electric shock or malfunction.

Fire warning

• Do not use open flame near this product. Failure to observe this may cause a fire, explosion, fluid leakage, electric shock or malfunction.

Wireless unit

• Do not use this product in an area where the use of radio waves is restricted, such as near medical devices. Otherwise, radio waves emitted from this product may affect the operation of medical electric equipment. When using this product in an airplane,  follow the instructions of the crew.
• Do not use this product within 15 cm (6 in) of a person with a heart pacemaker implant or a defibrillator implant. Otherwise, radio waves emitted from this product may affect the operation of the pacemaker implant or the defibrillator implant.

CAUTION
These precautions alert you to the possibility of physical injury to yourself or others.

Hearing loss

• Do not expose yourself to high volume sound for an extended period of time. Otherwise, hearing loss may be caused. Avoid listening for more than 40 hours per week at a volume level of 80 dB (A), or more than five hours per week at a volume level of 89  dB (A). If you experience any hearing abnormality, consult a physician.
• Minimize the volume from the device to be connected before connecting the plug. Failingto do so may result in hearing loss or device damage.

Handling

• Keep earbuds out of the reach of infants. Your children may accidentally swallow them.
• If the earbuds irritate your skin, stop using them. Otherwise, inflammation or rash may be caused.

NOTICE
Indicates points that you must observe in order to prevent product failure, damage or malfunction.

• Do not store this product in the following places.
  – Direct sunlight
  – Extremely high or low temperatures
  – Excessive dust
  Otherwise, malfunction or damage to the product may be caused.

• Use a soft, dry cloth to clean this product. Do not use benzene, thinner, detergents, chemical wiping cloths or cleaning fluids that contain alcohol when wiping the surface of this product, as this may cause discoloration or deformation.

• Do not place or hold the earbuds in the vicinity of a clock, magnetic card, or other object that can be affected by the magnetic field of the product. Otherwise, the data on the affected device may be corrupted or destroyed.

• Please observe the following:
  – Do not apply unreasonable force to the charging connector.
  – Do not dry this product off with hot or warm air from a hair dryer.
  – Do not tug on the USB power cable while it is connected.
  Failure to observe these points may damage the product.

• Do not do anything that could damage the supplied USB power cable.
  – Do not place it near a heater.
  – Do not bend it excessively or alter it.
  – Do not scratch it.
  – Do not place it under a heavy object.
  Using the power cord with the core of the cord exposed could cause electric shocks.

Information

The waterproofness of the earbud body is compliant with IPX4 (Earbud nozzle: excluding the sound conduit).
IPX4 indicates that this product will continue to function when exposed to splashing water from any direction. While this standard guarantees this performance with fresh water or tap water at room temperature, it does not guarantee equivalent performance  with warm water or seawater. In addition, malfunctions caused by water ingress due to incorrect handling are not covered by the warranty, even during the warranty period. The second digit of IPX refers to “Liquid ingress protection” according to JIS C 0920  (harmonized standard of IEC 60529), “Degrees of protection provided by enclosures (IP Code)”.

Notice regarding use

• Your ears may tingle in geographical locations where the air is very dry. This is not a malfunction of the earbuds, but is caused by static electricity on your body or a connected device.

Rechargeable battery

• This device contains a lithium-ion battery.
  – You should recharge the batteries at least once every six months, to ensure that they stay functional. If the batteries are not used for extended periods of time, they may fail to recharge.
  – The battery cannot be recharged at a temperature outside of that which is specified.
  Recharge the battery within the specified temperature range.
  – Rechargeable batteries have limited lifetimes, and their capacity degrades depending on the method of storage, the environment, frequency of use and the passage of time.
  – The battery is not removable by the user.
  – Lithium-ion batteries can be recycled. After usage, you may recycle the battery, but never attempt to remove it by yourself. Have the device inspected by qualified Yamaha service personnel. If there is no Yamaha service personnel in your area, dispose of it properly according to relevant environmental laws and disposal rules in your area.

• Do not use the earbuds at high volume in a public place. Sound leakage from the earbuds may be a nuisance to people around you.

• Maximum operating temperature : 40°C

• For details on the accessories, specifications and other information regarding this device, see the “User Guide”.

• If you plan to transfer ownership of this product, include this document and the supplied accessories along with the product.

• Follow the rules of your local authority to dispose of this product and its accessories.

• The illustrations in this manual are for instructional purposes only.

• All company names, product names and other such listings in this documentation are the registered trademarks or trademarks of their respective companies.

VGQ7000
© 2023 Yamaha Corporation
Published 08/2023
AMOD-A0

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