Download here if you want to try the BETA upgrade: Tanix TX28 Firmware
Kind of file: .ZIP
Procedure: Copy the .zip firmare on a USB memory or TF card. Conect it to the Tanix TX28. Open Update&Recovery.app (already installed). Select the .zip and press update.
Changelog:
ZENSTREAMS by Inivech®
Wireless Bluetooth Earbuds
200 Hours Battery
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ZENSTREAMS Earbuds by INIVECH