Which devices are supported by BT11?

At the beginning, the BT11 was designed to solve the problem of those devices that can't use the high quality Bluetooth codecs.

Such as iPhone15, Switch, PS5, PC, MAC and other such devices

This devices are generally using common Bluetooth codecs. The better ones could support AAC, but most of them only support SBC so the Bluetooth sound quality is poor.

With BT11, these devices can support high-quality Bluetooth and connect to Bluetooth headphones/ speakers which supports LDAC or Aptx for enjoying high-quality wireless Bluetooth sound.

Which Android phones are supported by BT11?

The BT11 uses the standard UAC1.0 protocol, which supports most Android mobile phones.

However, since many mobile phone systems are now deeply customized, the system settings of different mobile phones will be different, so some Android phones will not be supported.

Please refer to the introduction page for the list of supported devices:

https://www.fiio.com/bt11 

Actually, most Android mobile phones could support LDAC Bluetooth code. The LDAC protocol is standard, so there may not be much difference when using BT11 with these mobile phones. If your mobile phones could support similar Bluetooth codes like the BT11's, it is recommended to use the Bluetooth function of mobile phone directly.