Thank you for viewing. I purchased this a while ago, but I never used it and have been storing it. I'm listing it because I don't have any opportunities to use it in the future. The product description is below: The large fins protruding from the outlet achieve a quick and sharp sound with a fast rise time. ・Sound level: 109dB (1m) Available for immediate purchase. I plan to ship via Rakuraku Mercari, but please note that I may change to Yu-Yu Mercari.