I purchased this from B&H Photo, an authorized Marshall retailer in the US, last month. It was originally scheduled to arrive within a few days, but it was significantly delayed, and I no longer need it, so I am selling it. This is an authentic product, so please purchase with confidence. Marshall products being sold as new on Mercari for around 5,000 yen are likely counterfeit. The company that officially handles Marshall products in Japan has published information on how to spot fakes. Discounts and other information are listed in my profile. Thank you. Bluetooth headphones with over 80 hours of wireless playback. - Model Name: Major IV - Battery Life: Over 80 hours - Charging Method: Wireless charging