By existing Rezesionen I let myself be persuaded to buy this keyboard. The delivery came the next day in their original box, a little worn, without packaging. It's OK. If thrown away anyway. In addition, I would note here that's missing in the existing Rezesionen: It's from the keyboard for children's speech. The keys are narrower than the standard keys, but wider than the Bontempi keys (toys). Also the entire Keybord I would classify toys in the category. It must be purchased separately 4 batteries AA. The battery type was previously read anywhere, otherwise I could have been procure beforehand. On the back there is a connector for a 6V power supply. It is written everywhere that the keyboard can be operated with battery. Whether there is a power supply can be plugged in, I have to try. Conclusion: For children and adults who want to get a whiff even know if them make a keyboard fun, it's based on the unbeatable price. From the sound quality can not expect much one. 1 star deduction, as the left-most button is dead, so is not working. You never need anyway, so I also keep the keyboard as it is.