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 delayed and became unnecessary, so I am selling it. As it is an authentic product, please feel confident in your purchase. Marshall products sold as new on Mercari for around 5,000 yen are likely counterfeit. The company that officially handles the brand 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 - Color: Black - Bluetooth Version: 5.0 Thank you for viewing.