Audio-Technica ATH-CKS50TW Wireless Headphones

Safety Precautions

Thank you for purchasing this Audio-Technica product. Before using the product, read through this caution guide to ensure that you will use the product correctly. Please keep this manual for future reference.

Although this product was designed to be used safely, failing to use it correctly may result in an accident. To ensure safety, observe all warnings and cautions while using the product.

Cautions for the Headphones

• Do not use the product near medical equipment. Radio waves may affect cardiac pacemakers and medical electronic equipment. Do not use the product inside medical facilities.
• When using the product in aircraft, follow airline instructions.
• Do not use the product near automatic control devices such as automatic doors and fire alarms. Radio waves may affect electronic equipment and cause accidents due to malfunction.
• Do not disassemble, modify or attempt to repair the product to avoid electric shock, malfunction or fire.
• Do not subject the product to strong impact to avoid electric shock, malfunction or fire.
• Do not handle the product with wet hands to avoid electric shock or injury.
• Disconnect the product from a device if the product begins to malfunction, producing smoke, odor, heat, unwanted noise or showing other signs of damage. In such a case, contact your local Audio-Technica dealer.
• Do not allow the product to get wet to avoid electric shock or malfunction.
• Do not put foreign matter such as combustible materials, metal, or liquid in the product.
• Do not cover the product with a cloth to avoid fire or injury by overheating.
• Follow applicable laws regarding mobile phone and headphone use if using headphones while driving.
• Do not use the product in places where the inability to hear ambient sound presents a serious risk (such as at railroad crossings, train stations, and construction sites).
• The product effectively shields external sound, so you may not hear sound around you clearly while wearing the product. Adjust the volume to a level where you can still hear background sound and monitor the area around you while listening to music.
• Store the product out of the reach of small children.
• To prevent damage to your hearing, do not raise the volume too high. Listening to loud sound for an extended period may cause temporary or permanent hearing loss.
• Discontinue use if skin irritation results from direct contact with the product.
• If you begin to feel unwell while using the product, discontinue use immediately.
• When removing the product from your ears, check to make sure the eartips are still attached to the main unit. If the eartips become lodged in your ears and you are unable to remove them, consult a physician at once.
• If you develop an itch from wearing the product, discontinue use.

Cautions for Charging Case

• Do not disassemble, modify or attempt to repair the product to avoid electric shock, malfunction or fire.
• Do not subject the product to strong impact to avoid electric shock, malfunction or fire.
• Do not handle the product with wet hands to avoid electric shock or injury.
• Disconnect the product from a device if the product begins to malfunction, producing smoke, odor, heat, unwanted noise or showing other signs of damage. In such a case, contact your local Audio-Technica dealer.
• Do not allow the product to get wet to avoid electric shock or malfunction.
• Do not put foreign matter such as combustible materials, metal, or liquid in the product.
• Do not cover the product with a cloth to avoid fire or injury by overheating.
• Do not charge the product if water or foreign matter is inside the battery jack or USB charging cable. Doing so may cause corrosion, heat generation, smoke, fire, or other malfunction or electric shock in the battery jack or USB charging cable.
• Do not charge the battery if the terminal of the USB charging cable is bent, loose, or damaged. Doing so may cause heat generation, smoke emission, fire or electric shock.
• When charging, make sure to use the included USB charging cable.
• Do not charge with devices that have quick-charge functionality (with a voltage of 5 V or more). Doing so may cause the product to malfunction.
• Do not store the product in direct sunlight, near heating devices, or in hot, humid, or dusty places because such storage could cause malfunction or defect.
• Do not put the product close to fire because that could cause deformation or malfunction.
• Do not use benzine, paint thinners and electrical contact cleaner, etc. because use of such material could cause deformation or malfunction.

Cautions for Rechargeable Battery

The headphones and charging case are equipped with a rechargeable battery (lithium-ion battery).

• If battery fluid gets into eyes, do not rub them. Rinse thoroughly with clean water such as tap water and consult a doctor immediately.
• If battery fluid leaks, do not touch fluid with bare hands. If fluid remains inside the product, it may cause malfunction. If battery fluid leaks, contact your local Audio-Technica dealer.
• If fluid gets in your mouth, gargle thoroughly with clean water such as tap water and consult a doctor immediately.
• If your skin or clothing comes in contact with fluid, immediately wash the affected skin or clothing with water. If you experience skin irritation, consult a doctor.
• To avoid leakage, generation of heat or explosion:
  • Never heat, disassemble or modify the battery, nor dispose of it in a fire.
  • Do not attempt to pierce with a nail, hit with a hammer or step on the battery.
  • Do not drop the product or subject it to strong impact.
  • Do not get the battery wet.
• Do not use, leave or store the battery in the following places:
  • Area exposed to direct sunlight or high temperatures and humidity
  • Inside of a car under the blazing sun
  • Near heat sources such as heat registers
• Charge only with the included USB cable to avoid malfunction or fire.
• The internal rechargeable battery of this product cannot be replaced by the user. The battery may have reached the end of its service life if the usage time becomes significantly shorter even after the battery has been fully charged. If this is the case, the battery needs to be repaired. Contact your local Audio-Technica dealer for repair details.
• When the product is disposed of, the built-in rechargeable battery needs to be discarded properly. Contact your local Audio-Technica dealer to learn how to properly dispose of the battery.

For Customers in the USA

FCC Notice

Warning

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.

Caution

You are cautioned that any changes or modifications not expressly approved in this manual could void your authority to operate this 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.

This transmitter must not be co-located or operated in conjunction with any other antenna or transmitter used in other systems.

RF Exposure Statement

This device complies with FCC radiation exposure limits set forth for an uncontrolled environment and meets the FCC radio frequency (RF) Exposure Guidelines. This equipment has very low levels of RF energy that is deemed to comply without testing of specific absorption rate (SAR).

Contact:

Responsible Company: Audio-Technica U.S., Inc.
Address: 1221 Commerce Drive, Stow, Ohio 44224, USA
Tel: 330-686-2600

For Customers in Canada

ISED Statement

CAN ICES-3 (B)/NMB-3(B)

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada's licence-exempt RSS(s). Operation is subject to the following two conditions:

• (1)This device may not cause interference.
• (2)This device must accept any interference, including interference that may cause undesired operation of the device.

This device complies with RSS-102 radiation exposure limits set forth for an uncontrolled environment.

Notes on Use

• Be sure to read the connected device’s user manual before use.
• Audio-Technica will not be liable in any way for any loss of data in the unlikely event that such losses should occur while using the product.
• On public transportation or in other public places, keep the volume low so as not to disturb other people.
• Minimize the volume on your device before connecting the product.
• When using the product in a dry environment, you may feel a tingling sensation in your ears. This is caused by static electricity accumulated on your body, not by product malfunction.
• Do not subject the product to strong impact.
• Do not store the product in direct sunlight, near heating devices, or in hot, humid, or dusty places. Additionally, do not allow the product to get wet.
• When the product is used for a long time, the product may become discolored due to ultraviolet light (especially direct sunlight) and wear.
• If the charging case is placed in a bag while the USB charging cable is still connected, the USB charging cable may become caught, severed, or broken.
• Make sure to hold the plug when connecting and disconnecting the USB charging cable. The USB charging cable may become severed or an accident may occur if you pull on the cable itself.
• When you are not using the USB charging cable, disconnect it from the charging case.
• When you are not using the product, store it in the included charging case.
• If you use eartips other than those included, the headphones may not fit into the charging case, or may not charge. Be sure to use the included eartips.
• When using the product, select the eartips that fit your ears best, and wear the product securely.
• This product can be used to talk on the phone only when using a mobile telephone network. Support for telephony apps that use a mobile data network is not guaranteed.
• If you use the product near an electronic device or transmitter (such as a mobile phone), unwanted noise may be heard. In this case, move the product away from the electronic device or transmitter.
• If you use the product near a TV or radio antenna, noise may be seen or heard in the television or radio signal. In this case, move the product away from the TV or radio antenna.
• To protect the built-in rechargeable battery, charge it at least once every 6 months. If too much time passes between charges, the life of the rechargeable battery may be reduced, or the rechargeable battery may no longer be able to be charged.
• Charge the product in a well-ventilated place (10 to 35°C (50 to 95°F)) away from direct sunlight. Otherwise, the battery may deteriorate, possibly resulting in shorter periods of continuous use or may fail to charge.
• If the headphones are wet, wipe them with a dry cloth before placing them in the charging case. The charging case is not water-resistant (drip-proof). Do not charge the product if the headphones are wet.
• The hear-through function of the product allows you to hear the sounds around you through the built-in microphone. Depending on the volume of the music being played back, the surrounding sounds may be difficult to hear. In this case, turn down the volume of the music.
• Depending on your surroundings, the ambient sounds may be difficult to hear even when using the product’s hear-through function. Do not use the product in places that are dangerous if you cannot hear the surrounding sounds, such as places with heavy traffic.

About the Active Noise-Cancelling Function

The product is designed to use its built-in microphone to pick up noise from the surrounding environment (noise from vehicles, noise from air conditioners, etc.) and to cancel out that noise by producing sounds in negative phase. This results in a reduction in the sounds in your environment.

• The product’s noise-cancelling function is mainly effective against noises in the lower frequency range, but not all noises are cancelled.
• Depending on the type of noise (or in quiet locations), you may not notice the noise-cancelling effect.
• The noise-cancelling effect may vary or a bleep (howling) may occur depending on how you wear the product. In these cases, take off the product and put the product in your ears again correctly.
• To maximize the noise-cancelling effect, select the eartips that offer the best sound insulation for each side to block surrounding sound, and insert the headphones into the ears correctly.
• When you use the product in a train or a vehicle such as bus or truck, noise may be heard depending on rail/street conditions.

Troubleshooting

If the product does not connect to a device

If pairing cannot be cancelled or is not successful, you can use forced pairing mode to perform pairing again. When performing this procedure, hold the headphones so that they do not come off the charging case.

1. About 5 seconds after both headphones (L (left) and R (right) sides) are placed in the charging case (with battery remaining), press and hold (about 6 seconds) the multifunction buttons of both headphones.
2. When the indicator lamps on both headphones light in red, remove the headphones from the charging case.
   • The product will switch to the “searching for devices” (pairing mode) state and you will be able to pair with your desired Bluetooth device.
   • If the procedure cannot be completed as expected, remove the headphones from the charging case again and repeat the procedure from the beginning.

If the product operates abnormally

Reset the product. When performing this procedure, hold the headphones so that they do not come off the charging case.

1. About 5 seconds after both headphones (L (left) and R (right) sides) are placed in the charging case (with battery remaining), press the multifunction buttons of both headphones twice in a row.
2. Verify that the indicator lamps on both headphones flash white, and then press and hold (at least 6 seconds) the multifunction buttons on both headphones while in the charging case.
   • Make sure the indicator lamps on both headphones light in red and then turn white before releasing your fingers. Reset is complete.
3. Remove the product from the list of registered devices on your Bluetooth device.
4. Remove the headphones from the charging case again and perform pairing.
5. If the procedure cannot be completed as expected, remove the headphones from the charging case again and repeat the procedure from the beginning.

About Water-Resistant (Drip-proof) Performance

• The water-resistant (drip-proof) specification of this product applies only to the headphones, not the charging case.
• Although the headphones have water-resistant (drip-proof) capabilities equivalent to IPX4, the part where the sound comes from is not water-resistant (drip-proof).
• The water-resistant (drip-proof) performance is designed to protect the headphones if they get wet from rain, etc. (equivalent to IPX4). JIS/IEC protection grade IPX4 means that the product is protected against exposure to flying water from all directions.
• The headphones cannot be used underwater.
• The headphones cannot be used in hot and humid places, such as bathrooms.
• The headphones are not waterproof. Submerging them in water may cause damage.
• The headphones may not function properly if they become wet. Wipe the headphones with a dry cloth, shake them multiple times to remove any excess water, and allow the headphones to dry thoroughly before use. For more information, refer to the user manual on the Audio-Technica website.

For a More Comfortable Bluetooth Communication Experience

The effective communication range of this product varies depending on obstructions and radio wave conditions. For a more enjoyable experience, please use the product as close as possible to the Bluetooth device. To minimize noise and sound disruptions, avoid placing your body or other obstacles between the product’s antenna and the Bluetooth device.

Diagram Descriptions

The document includes small diagrams illustrating:

• Antennas
• Indicator lamp
• Multifunction button