There is no auto accompaniment, but you can connect any other source via wire or bluetooth. You can record yourself, listen and analyze. You can record one melody, but 2 channels separately, for example, the left and right hands in turn. You can practice with headphones, even together. But it's probably almost everywhere. You can split the keyboard into 2, and play as a duet (2 identical short keyboards). It is not possible to select different instruments. I did not test the audio output, I have nowhere to stick it. Can run on 6 AA batteries. I read somewhere that 4 hours. Outcome. This is a good classic piano in a compact body, and with some additional features. I am satisfied. Bonus. If you leave the lessons, you can still use the piano as a portable (12kg) stereo system, wired or bluetooth. The sound is good, clear, but without bass. You can also use it as a headphone splitter.
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