the keyboard would indeed adequately evaluated (without power supply). Replaces wg. the size of the keys and the limited gamut not a full keyboard. Takeaway and easy Rumklimpern but a great part. Have measured it with sounds, because in a review had (but not in each individual product range) someone wrote, 2 buttons were reversed. This is definitely in my copy is not the case. With the power supply (I would have bought anyway, to be independent of batteries or rechargeable batteries) a favorable offer. From the sound quality here better than expected. More quality at the price does not go. So dragging element (large keyboard can stay at home) anyway class. Does not hold much space the Small.