Why does signal interruption occur in some places, such as along the railway and the airport?
There are usually lots of underground cable lines along the places mentioned above, which might cause electonmagnetic interference and result in the siganal interruption.
Why my earbuds don't power on/off automatically?
The earbuds would not power off automatically when the case is at low battery or out of power. Please recharge the case. And you can long press for four seconds to power on and long press for four seconds to power off the earbuds.
What's the IP rating of F4?
F4 meets the IPX7 rating, which protects it from water and sweat. If you suddenly drop it into the water, it will survive, as long as the water isn’t deeper than 1 meter, and if you take it out in less than 30 minutes. Please let it air dry if you dropped it into water.
How can I clean the earbuds?
1. Clean the contact pins using a clean cloth or cotton swab dipped in alcohol-based disinfectants. For precise cleaning, put the cloth on the end of a toothpick.
2. Pull off the eartips and clean the metal mesh with a dry cotton swab. Remove any debris from the metal mesh with a clean, dry, soft-bristled brush.
3. Do not use sharp objects or abrasive materials to clean F4.
4. Do not let water get inside F4 and if you used a watered swab to clean the mesh, let them air dry after cleaning.
How can I switch between normal mode and bass boost mode?
Tap the left/right earbud for five times.
How to active game mode?
Tap the left/right earbud for 4 times.
My earbuds don't charge, what can I do?
Please try to follow the below steps:
1. Clean the charging slot on charging case.
2. Clean the charging connector on earbuds.
How long does it take to fully charge the earbuds?
About 1 hour.
How long does it take to fully charge the charging case?
About 1 hour.
How many times can the charging case recharge the earbuds?
It can give 4-5 full recharges to the earbuds if the case itself is fully recharged.
How long can I play with the earbuds after a full charge?
They support up to 8 hours of continuous playtime on a single charge.
Why the earbuds don't turn on when I take them out of the charging case?
1. Please long press the earbuds and hold for 4 seconds to see if you can power them on manually.
2. If not, recharge both the charging case and the earbuds and try again.
3. If still doesn’t work after recharging, see "How to reset the F4 earbuds?".
What should I do if the earbuds still playing when I put them back into the charging case?
When the charging case is at low power or out of power, the earbuds will not power off automatically when you return them to the charging case. Please long press the touch control button for 4 seconds to power them off manually, and recharge the charging case.
What should I do if there is no sound while connecting to a computer?
1. Delete the pairing record and reconnect F4 again.
2. You may need to select the F4 as the default playback and output device. This can be found in your computer's audio settings.
3. Update your computer's Bluetooth driver or buy a Bluetooth adapter that is compatible with your computer.
What should I do if only one earbud has sound?
1. Put the earbuds into the charging case, pick them up and reconnect.
2. If that doesn't work, see "How to reset the F4 earbuds?".
What should I do if the sound is inconsistent on right and left earbud?
1. Please clean the eartips and the mesh filter on the earbuds gently with a dry cotton swab or cloth.
2. Reset the earbuds. See "How to reset the F4 earbuds?"
How to reset the F4 earbuds?
1. Delete the pairing record on your device, turn off the Bluetooth.
2. Pick up both earbuds and turn them off;
3. Press and hold BOTH earbuds up to 6-8s until the red lights blink;
4. Reconnect the earbuds,then they will sync together and enter the pairing mode automatically.
Will the Bluetooth mouse cause the signal interference?
Perhaps. When your Bluetooth mouse and earbuds are connected to the same device, it might happen.
Can F4 be paired with multiple devices at the same time?
No, F4 doesn’t support multipoint connection. If you want to connect F4 to a second device, please disconnect T30 from the first device.
What should I do if the earbuds don't pair with my device?
1. Delete the pairing record on your device, turn off the Bluetooth and turn it on again to pair it with your earbuds again.
2. If the earbuds are not pairing, please try to reset your earbuds. See "How to reset the F4 earbuds?"
What should I do if F4 disconnects?
1. Delete the pairing record on your device, turn off the Bluetooth and turn it on again to pair it with your earbuds again.
2. Reset the earbuds. See "How to reset the F4 earbuds?"
What should I do if the earbuds do not reconnect to the last paired device automatically?
Please try the below tips and see if they help:
1. Forget the pairing record on your device and reconnect again.
2. Reset the earbuds. See "How to reset the F4 earbuds?"
What should I do if only one earbud works?
1. Delete the pairing record on your device, turn off the Bluetooth and turn it on again to pair it with your earbuds again.
2. Long press the one that doesn’t work and see if you can manually power it on or off.
3. If not, recharge it and check again.If yes, please see "How to reset the F4 earbuds?"
