This gong is recommended for boxing, martial arts, karate, kickboxing, and pro wrestling clubs. It resonates incredibly well. The volume and resonance are comparable to those of a certain Winning brand. The most important thing for a gong is its resonance. A gong that doesn't resonate, like those from a certain Isa company, doesn't fulfill its role as a gong. This one will get you fired up for training and matches. It's an extra-large 25cm size. You can hear the powerful sound on YouTube at the following link: https://www.youtube.com/watch?v=6RiGdy_8Bqk For reference, here's the sound of a 6-inch gong: https://www.youtube.com/watch?v=YfJB9pM1YdE https://www.youtube.com/watch?v=BOR6zDXIebY This is a 10-inch gong, so it's even louder. Recommended for pro wrestling clubs, boxing gyms, etc.