This is a propane-type gank drum, which is no longer in production due to the difficulty of obtaining the materials. I purchased this one and tried it out. Gank drums are carefully handcrafted one by one, and the number produced is small, so they don't depreciate in value even when used. However, due to a move, I'm offering it at a reduced price to someone who will cherish it. If anyone is interested in collecting it, please let me know. This is not a Solfeggio drum. The scale and Hz are unknown, but it produces a very soothing and pleasant sound. There are some minor scratches, but there are no issues with playing it, and it's in good condition for a used item. Please refrain from purchasing if you are sensitive to used items. The listing includes only the gank drum in the photos; there are no accessories. *Please be sure to read the profile before purchasing. Instant purchase is OK. No price reduction.