A. Unfortunately, it is not possible to use Bluetooth headphones with any digital piano. This is because of the lag between pressing the key and the sound reaching the headphones.
With cabled headphones, there is no delay but with Bluetooth headphones, the Bluetooth transmission causes an unacceptable gap between playing the keys and hearing the sound come back.
For this reason, the Bluetooth functionality is only provided to allow audio streaming of music from a phone or tablet through the speakers of the PX-S1100.