Thank you for viewing. This is the SSK naigai TECHNICAL PITCH. With the dedicated app, you can measure speed, spin rate, axis angle, and the amount of force used when throwing, all with your smartphone. https://technical-pitch.com/ I bought it because I used to pitch, but I mainly played other positions, so I hardly used it (about 10 times). The usage目安 is about 10,000 pitches, so it's still in great condition. The user license and instruction manual are also included, so you can use it without any problems. I think it would be fun to measure speed with your team. I will also include a separately purchased soft case. - Brand: naiga - Model Name: TECHNICAL PITCH - Ball Type: Soft ball J-ball