It is an application of "VIE FIT" earphone.
VIE FIT Firmware Update Function:
Release note of Vie Fit Firmware Ver.25.0 (Sep,2018)
1: Improvement in Automatic On/Off
2: Raise Microphone Volume
3: Bug fix with the specific phones of next song/Pause
4: Qualcomm’s patch for the iOS Update function
Please refer to the following the instruction step by step to upgrade the firmware.
* It's very important to follow these steps in order to avoid any issue.
1: Please make sure your phone and earphones are FULLY CHARGED.
2: DELETE the previous Bluetooth pairing setting on all of your devices (Phones).
3: Download Vie Fit app via Android device (OS version 4.4 or later).
Upgrade one earphone:
1: Power on ONLY ONE SIDE of the earphone.
2: Pair ONE of the earphones to the Android phone.
3: Open the Vie Fit app and select the appropriate earphone, "Vie Fit L" or "Vie Fit R” and Press start.
4: On the next screen, press the blue big circle button to upgrade.
5: After the data transfer is completed, press “yes” on the message boxes (twice).
6: After the upgrade is completed, shut down the app.
7: DELETE the pairing setting on your phone.
8: Power off the earphone.
Upgrade the other earphone:
Follow the same procedures as above with the other earphone.
*It is mandatory to update BOTH SIDES of the earphones to work properly.
Restart your phone and pair the earphone:
1: After the upgrade is completed, RESTART your phone and earphones.
2: Pair ONLY ONE SIDE of the earphones to your phone.
3: Power on the second earphone and wait for the pairing.
4: Listen to the music for a while. (It may take a while to become stable)
If you encounter any issue during the upgrade,
Please contact Vie support, firstname.lastname@example.org