This is an old piece of equipment, but it works normally. When I was in junior high school, there were no silent drums yet, and only expensive, space-consuming drums were available. I couldn't put one at home, and I didn't have any money, so I bought this, which had just been released at the time, and practiced with it. Later, I bought drums and a guitar, and I used this as a metronome. A professional performer tried it out and played some impressive fills, even on this toy-like instrument. I'm selling it because my child is no longer at an age to play with it. Unfortunately, the power adapter is not included. It can run on batteries, but if you purchase a multi-AC adapter like the one in the last image, you can use it as much as you like with a 100V power supply. Please refer to the images. Thank you.