This is an ultra-compact AC adapter from FINsix, purchased in November 2018, which was the world's smallest at the time. It's a 65W AC adapter for laptops, compatible with major PC manufacturers, and the world's smallest. Please check compatibility with your own PC. It comes with 9 different adapters. Unfortunately, a USB-C adapter is not included. You can find more details on Amazon, where it sells for around 12,000 yen. Search for "finsix dart". I bought it to reduce the amount of luggage I carry when traveling abroad, but I haven't had much opportunity to use it, so it's in near-new condition. More details are also available on the website of Marubun Corporation, the Japanese distributor.