・Earbuds
・Charging case
・Eartips (S / M / L)
・Dust filter
・Fine-tipped maintenance swab
・Quick manual

(Case)
A: Pairing button
B: LED indicator
C: USB port

(Earphones)
D: Tap sensor
E: Mic

Remove both earbuds from the charging case, take off the insulation sheet, and place them back into the case.

Charging the charging case:
Please charge the charging case according to the recommended USB charging conditions below. While charging, the LED indicator on the outside of the charging case will light up according to the battery level of the charging case, as shown in the table below.

Note: A charging cable is not included. Please use a commercially available USB cable.

[Recommended USB charging conditions]
USB charger: A commercially available USB charger capable of supplying an output current of 0.5A (500mA) or higher
USB cable: USB Type-C cable (USB-compliant)

Charging the Earbuds:
When you place the earbuds into the charging case and close the lid, the earbuds will power off and charging will begin. For about 3 seconds immediately after closing the lid, the LED indicator on the outside of the charging case will light up or blink according to the battery level of the charging case, as shown in the table above.

After charging, opening the lid of the charging case will automatically turn on the earbuds. For about 3 seconds immediately after opening the lid, the LED indicator on the outside of the charging case will light up according to the battery level of the charging case, as shown in the table below.

Note: If the LED indicator on the outside of the charging case does not light up when you open the lid, the case battery is at 0%. Please charge the case immediately. In this state, the earbuds will not turn on automatically when you open the lid. Please plug the charging cable into the case and remove the earbuds while the case is charging.

When the charging case has sufficient battery level, placing the earbuds into the charging case and closing the lid will turn the earbuds off and begin charging*1. For approximately 3 seconds immediately after closing the lid, the LED indicator on the charging case will light up or blink according to the battery level, as shown in the table above.

Note:
1. If the orange LED indicator flashes immediately after the lid is closed, the battery level of the charging case is very low, and the earbuds will not be charged. Please charge the charging case as soon as possible.
2. If the LED indicator on the outside of the charging case does not light up when you open the lid, the case's battery is at 0%. Please charge the case immediately. In this state, the earbuds will not turn off automatically even if you place them back into the case. Please connect the case to a charger, or wait until it is fully charged, before placing the earbuds back inside.

When connecting your earbuds to a smartphone or other device for the first time, pairing is required.
The next time you turn the earbuds ON, they will automatically reconnect to the device that was last connected.

When using the earbuds for the first time:

1. When you open the lid of the charging case, the earbuds will automatically power ON and enter pairing mode. At this time, the LED indicator in the charging case will blink.
2. Turn on the Bluetooth function on your smartphone or other device, and when “final ZE500 NYUMIN” appears on the screen, select it. When the display on the device shows “final ZE500 NYUMIN Connected”*, pairing is complete.

Re-pairing or pairing with an additional device:

1. With the charging case lid open and the earbuds stored inside the case, press the pairing button on the charging case twice. This will activate pairing mode. The LED indicator in the charging case will blink at this time.
2. Turn on the Bluetooth function on the smartphone or device you wish to connect, and perform the pairing procedure.

Note: The display may vary depending on the device used.

Note: These earbuds are equipped with a tap sensor (accelerometer), which is designed to prevent accidental operations and playback interruptions while you sleep. Unlike conventional touch sensors, this sensor detects vibrations. Depending on the shape of your ear, these vibrations may sometimes be harder for the device to detect. Please try gently tapping the earbud with your finger to find the most responsive spot.

These earbuds support single-ear use. Once you have paired the earbuds with your smartphone or device, simply leave one earbud in the charging case and take out the other. It will automatically connect in Single Ear Mode. In this mode, the left and right stereo channels are mixed together, providing a natural listening experience even when using just one earbud.

The "final ZE500 NYUMIN" app is a dedicated application that allows you to customize your earbuds to your personal preferences. By downloading it to the device paired with your earbuds, you can access the following features. We highly recommend downloading the app to enhance your listening experience:

・ Tap Controls & Voice Guidance: Disable touch controls and system voices to prevent bothersome interruptions while falling asleep.
・ Bedtime Volume Mode: Ensures comfortable and clear listening even at very low volumes.
・ Sleep Sounds: Optimizes the audio by reducing harsh stimuli, perfect for falling asleep.
・ Sleep Timer: A convenient timer for bedtime.
・ Voice Smoothing: Smooths out the rough edges and distortion often found in compressed audio sources.
・ Find My Earbuds: Locate your missing earbuds by making them play a sound.
・ Firmware Updates

If pairing does not work properly or an unexpected error occurs causing the earbuds to malfunction, please reset the earbuds using the steps below. After the reset is complete, try pairing again.

1. With both earbuds placed in a charging case that has sufficient battery, press and hold the pairing button for about 10 seconds. Release the button when the LED indicator inside the case starts flashing rapidly.
2. After a short time, the earbuds will automatically enter pairing mode with your smartphone or other device, and the LED indicator in the charging case will start flashing. Reset is now complete.
3. Once the reset is complete, the earbuds return to factory settings and all pairing information stored on the earbuds will be deleted. Therefore, delete the pairing information for this product from your smartphone or other device before attempting to pair again.

Note: The settings configured in the app, including "Tap Controls & Voice Guidance," "Bedtime Volume Mode," "Voice Smoothing," "Voice Guidance Volume," and "Tap Controls ON/OFF," will also be reset.

If you feel that the bass is weak or high frequencies sound harsh, the eartips may not be fitted properly. To enjoy the intended sound quality of the earbuds, it is important to attach the eartips correctly and ensure that your ear canal is properly sealed. Please try the following methods to achieve the correct fit:

・If you feel discomfort when wearing them, try the S and L sizes as well.
・Since the size of the ear canal can differ between the left and right ears, try using different ear tip sizes for each side.

・Cause1：(Immediately after purchasing) Battery level is low
For safety of transportation from overseas, laws and regulations do not allow the internal battery to be fully charged at the time of shipping. For that reason, voltage may fall below the level required for operation at the time the customer opens the package. Please refer to “Charging” above.

・Cause2：Earbud’ s battery is depleted
Please return the earbuds into the charging case and close the case to charge them. (In case the charging case power has run out, please charge the charging case first.) Please refer to “Charging” above regarding the method for charging.

・Cause3：An error has occurred due to improper operation
In some cases, performing a reset operation may fix the problem. Please refer to “Performing Factory Reset” above.

・Cause4：Charging case battery is depleted
If opening and closing the charging case lid does not activate the LED indicator, it means that the charging case battery is completely depleted. In this state, opening the lid will not automatically turn on the earphones, so please charge the earphones. For detailed charging instructions, refer to the “Charging” section above.

・Cause1：Charging case battery is depleted
If opening and closing the lid of the charging case does not cause the LED indicator on the case to respond, this indicates that the battery of the charging case is completely depleted. In this state, even if you place the earbuds in the charging case and close the lid, the earbuds will not turn off automatically. Please charge the earbuds. For details on how to charge, refer to the section “Charging” above.

・Cause2：(When the earbuds do not turn off even when placed in the charging case) You are using eartips other than the supplied ones.
Normally, when the earbuds are placed in the charging case with sufficient battery and the lid is closed, the earbuds automatically turn OFF and begin charging. However, if you are using eartips other than the included ones, they may interfere with the charging case, preventing proper charging and causing the earbuds not to turn OFF. Please check whether the earbuds operate normally with the supplied eartips.

・Cause1：Metal contacts on earbud are not touching the pins on the charging case
Please ensure that the insulation stickers attached to the metal contacts are peeled off, and that the metal contacts are touching the pins in the charging case.

・Cause2：Charging case battery is depleted
Normally, when the earbuds are placed in the charging case with sufficient battery and the lid is closed, the earbuds automatically turn OFF and begin charging. If charging does not start, the charging case itself may not have enough remaining battery. Please charge the charging case and try again. For details on how to charge, refer to the “Charging” section above.

・Cause3：The lid of the charging case is not closed
If the lid of the charging case is not fully closed while the earphones are stored inside, charging will not start. Please ensure that the lid of the charging case is properly closed.

・Cause4：Using eartips other than the supplied ones.
Normally, when the earbuds are placed in the charging case with sufficient battery and the lid is closed, the earbuds automatically turn OFF and begin charging. However, if you are using eartips other than the included ones, they may interfere with the charging case, preventing proper charging and causing the earbuds not to turn OFF. Please check whether the earbuds operate normally with the supplied eartips.

・Cause1：Earbuds are not in the pairing mode
In some cases, performing a reset operation may fix the problem. Please refer to “Performing Factory Reset” above.

・Cause2：( If pairing has been performed once ) Connected to a previously connected device
Please try performing the pairing operation again after having deleted the pairing information from the previously paired device.

Unstable connection caused by interference from external factor
Bluetooth communicates using the 2.4GHz band. This band is used by other wireless standards such as Wi-Fi, etc., and so there is a possibility of receiving interference. Moreover, this 2.4GHz band does not penetrate liquids. There is impact from humidity and rain, and the human body also contains liquid, so there are individual differences in connectivity. Furthermore,it depends on the specifications of smartphones and other devices. For that reason, switching OFF unused Wi-Fi / Bluetooth settings on surrounding devices, etc. is a countermeasure. While outside, there is a possibility that moving a smartphone from inside a bag to a breast pocket, etc. or otherwise reducing the distance between devices may improve the connection status.

・Cause1：The left/right earbud pairing has been released
In some cases, performing a reset operation may fix the problem. Please refer to “Performing Factory Reset” above.

・Cause2：The battery of one side of the earbuds has depleted
Please return the earbuds into the adequately charged charging case and close the case to charge it. Please refer to “Charging” above regarding the method for charging.

Based on the design specification, one side is the parent and the other side is the child, so the burden between left and right is different
Under the specification for Bluetooth earphones, communication generally takes place with one side as the parent and the other as the child. As such, the child only communicates with the parent, but the parent communicates with the smartphone or other devices and communicates with the child as well, and so there is a difference in the level of burden borne by the left and right earphone. As a result, a difference in the battery consumption between the left and right may occur.

The output of the USB adapter being used for charging is low
When using a USB port on a PC or similar device, the output may be low, resulting in longer charging times than the rated value. Therefore, when charging this product, please use a USB charger capable of supplying 0.5A (500mA) or more.

・Cause1：Tap control is set to OFF
Tap controls are disabled while "OFF" is selected in the app's Tap Control Settings.
To use tap controls, please select "ON" in the "Tap Controls & Voice Guidance" settings, or select "ON" under [Settings] > "Tap Control Settings".

・Cause2：Tap vibrations are not being detected
Unlike conventional touch sensors, this tap control works by detecting vibrations. Depending on the shape of your ear, these vibrations may sometimes be harder for the sensor to pick up. Please try gently tapping the earbud with your finger to find the most responsive spot.

Voice guidance is set to OFF
Voice guidance will not play while "OFF" is selected in the dedicated app's Voice Guidance Output settings. To enable voice guidance, please select "ON" in the "Tap Controls & Voice Guidance" settings, or select any option other than "OFF" under [Settings] > "Voice Guidance Volume Settings".

Dust filter at the nozzle opening is clogged with build-up
Dirt on the filter can cause a decrease in sound pressure. Before wearing the earbuds, please clean your ears and take care to avoid getting the filter dirty. If dirt does accumulate on the filter, gently clean it by lifting the dirt with a small brush or a cotton bud.

Poor contact between the earbuds and the charging case may prevent them from charging, or cause a "link-back" issue where the earbuds fail to disconnect from your smartphone. Please regularly use the included "fine-tipped maintenance swabs" to remove any dust or dirt from the charging contacts on both the earbuds and the charging case. Please note that even if no dirt is visible, the buildup of natural skin oils can still cause poor contact.

Please gently remove any debris attached to the dust filters, taking care not to damage the device. For example, you can carefully lift the debris by letting it stick to the tip of a cotton swab. Please be careful to prevent any debris from falling inside the earbuds. If the dirt cannot be removed, please replace the filters with new ones (make sure to replace both the left and right filters at the same time). Additionally, please clean the vents using a cotton swab or similar tool.

Note: Please refer to the user guide video "Maintenance Guide" for detailed instructions on general care and how to replace the dust filters.

The rechargeable batteries built into the equipment are recyclable. During disposal, please follow the instructions from your local municipal government and do not attempt to disassemble the product.

The warranty for this product is valid for 1 year from the date of purchase. During the warranty period, we will repair the product based on the provisions below. The warranty is only valid in the country in which the product was purchased. Regarding questions pertaining to repairs, please contact the store you purchased the product from or contact us by visiting our “Contact” page.
1. If the product malfunctions within the warranty period under the usage conditions specified in the warnings and cautions of this manual, we will repair it free of charge.
2. In the following cases, repairs to the product will be subject to a fee even during the warranty period:
(1) Original purchase receipt or other documentation showing the date of purchase are failed to be presented.
(2) The product is identified to be modified, disassembled, or repaired by a third party or customer other than our company or our authorized organizations.
(3) The earphones were subjected to a strong impact or were allowed to get wet. Product failure resulting from an excessive use of force on the product.
(4) Failure due to fire, earthquake, wind, flood, lightning, or other acts of God, human error, theft, or virus and malware infection.
(5) Repair of scratches on the surface of the housing or repair of the housing itself
3. We shall not be liable for any incidental or consequential damages for breach of any express or implied warranty or condition on this product. Nor shall recovery of any kind against us be greater than the original purchase price of the product from us or an our authorized dealer

Please contact us by visiting our official “CONTACT” page