Yousician supports Bluetooth headphones on iOS, Android and macOS.
On Windows devices, you can use Bluetooth headphones with Windows 10 Audio driver. You can access the driver settings via the Advanced audio settings in the Game tab.
Note: wireless technology can be too slow when used with musical instruments. This can lead to increased latency. If your instrument is connected to your device, the Mixer feature stops working when the app detects increased latency.