Support Center

The total battery life is 35 hours.
The headphones can be used for 7.5 hours on a single charge.

1. Use a dry cloth or cotton swab with a bit of rubbing alcohol to clean the charging pins in the charging case and on the earbuds to ensure a better connection.
2. Charge your charging case with a different charging cable and wall charger, and make sure the charging case has enough power.

Due to different usage habits and varying battery health between the left and right ears, it is normal for there to be some difference in battery consumption between the two earbuds during use.

1. Ensure the earbuds are seated properly in the case.
2. Clean the charging contacts on both the earbuds and case to ensure a proper connection.

No, QCY Crossky C50 uses air conduction.

1. After connecting device A, turn off Bluetooth
2. Then turn on device B Bluetooth and search for connections
3. Reopen device A to achieve one-to-two
When two devices are connected: pause the music or video and other media audio on the current device, click the music on the other device, and the video will automatically switch to play.

No, they cannot. The ear clips can be connected to two devices at the same time using Dual Connection, but they can only play audio from one device at a time.

Yes, they can be used directly upon being taken out of the case, including when only removing a single earbud.

To connect two devices:
Step 1. Pair the headphones with device A.
Step 2. Disable Bluetooth on device A, and the headphones will enter pairing mode.
Step 3. Pair the headphone with device B.
Step 3. Re-enable Bluetooth on device A and reconnect to the headphones.
After this initial setup, the headphones will automatically connect to both devices next time.

1. Use your earbuds regularly to avoid battery over-discharge. Aim to use them at least once a month.
2. Charge the earbuds after each use, and don't wait until they drop below 20% to charge.
3. Open the case at least once a month to check that everything works, and charge the case monthly.
4. Clean the charging pins on both the earbuds and case regularly.
5. Keep the ear tips clean and wipe the metal mesh with rubbing alcohol.
6. lf they get wet, use a hairdryer on the 'cool' setting to dry them.

Unfortunately, due to issues related to shipping costs and customs fees, we are unable to sell the charging case separately

You can use an alcohol pad or a regular wet wipe to gently clean the surface. Please do not soak them in water.

Please use a dry, soft-bristled brush to clean the dust filter on your headphones to prevent dust from clogging the filter and causing low volume.

1. Adjust the ear tips: Try using diferent sizes of eartips and ensure the earbuds are positioned correctly to create a tight seal. This can improve both sounoquality and noise cancellation.
2. check the audio source: Test different types of music and make sure the audio source is clear and free of distortion or noise.
3. Customize the EQ settings: use the QCY app to try different EQ modes or customize the sound profile to suit your preferences.