As the other user said, a Bluetooth transmitter is what you are looking for. But I wouldn’t use wireless for piano practice since even a small lag can throw you off your game. I use a long wired headphone for when I practice

It depends on the custom duty official. Last year they charged me 100% duty on an imported hearing aid. Another time I was charged 300 rupees for a 1500 rupee purchase. Expect to pay up to 100% of the declared value.

Focal clear + if hip DAC for portability

Chord mojo2. Don’t overthink it.