The All Japan Theremin Festival has been announced for March of next year, and the theremin is currently gaining popularity. This is the Gakken Adult Science Theremin Premium. I am selling it as a set with a separately purchased stand that is the perfect height for tabletop use. The Theremin Premium allows for pitch and volume adjustment with the included two antennas, making it a higher-end model than the Theremin mini. Includes the instruction manual, sheet music book, and box. The rubber on the ground band for the arm has stretched, so it has been replaced with a new one (and I'll include a spare). Also, the plastic screwdriver for adjustment is missing, but I will include a homemade wooden screwdriver instead (metal screwdrivers are not usable). The antennas are slightly loose, but this is due to the original crimping during product manufacturing and does not affect use. Power is supplied by four AA batteries, and it has a built-in speaker and a headphone jack (mono). External power cannot be used. The stand is made of plastic, which has a small impact on pitch/volume adjustment. It also helps to reduce the effect of metal table legs when used on a table. If you want to know what a theremin is like, or if the Theremin mini is not quite enough but you don't want to spend too much on a more expensive model, how about this as an option? Many sellers comment that tuning is difficult, but I think it's probably because it doesn't work as described in the manual. The Volume control on the left is probably not that important, and it's enough if the sound gets louder. For the Pitch control on the right, I think it's better not to be too concerned with the Pitch Adjust setting and set it to a general position, and then find the right spot with the Pitch Trim (this is just my personal opinion). There is almost no yellowing, and it is in relatively good condition, but please purchase it if you understand that it is a used item.