Purchased in 2025 and used for about 10 days. The membership has expired, so to use it again, you need to pair it with the mobile app and then pay the required annual fee (unlimited US$249 per year, or US$149 for 6 days). If purchased in Japan, the first year's annual fee is free, and the price is about 55,000 yen, so I am selling it at a price that is about 10,000 yen cheaper, including the annual fee. The app itself can measure various things, so I think it's an interesting product that allows you to check your skiing skills. Below is the product manual. AI Ski Coach / Real-time Analysis Sensor Equipped Model From the UK, an experience like a private lesson: AI Ski Coach "Carv 2" It's the world's first smart ski gadget that analyzes your skiing in real-time and provides advice via voice. Simply attach the sensor to your ski boots with clips and connect it to your smartphone via Bluetooth. The AI automatically analyzes your form, angle, and weight transfer every time you ski, providing optimal coaching. It visualizes your skiing, creating an experience like having a private lesson. This next-generation outdoor gadget uses the latest technology to take your skiing to the next level. How to Use • Clip & Go Design: Just attach the sensor to the boot straps. • AI Motion Analysis: Automatically tracks turns, edge angles, and posture. • Real-time Voice (English) Coaching: Receive advice through your earphones while skiing. Level-Specific Coaching Features • For Intermediate Skiers For those who ski on groomed courses with stem turns and parallel turns. Transition from stem to parallel to carving. Improve balance and stability. Challenge yourself to more advanced courses. • For Advanced Skiers For those who can ski stably on most courses. Conquer difficult terrain. Correct form habits. Improve control accuracy at high speeds. • For Expert Skiers For those who can ski dynamically on all terrains. Optimize form for each terrain. Beautiful turns off-piste. Maximize the precision of your skiing. About Subscription Thank you for viewing.