Used a few times after purchasing new. However, when I used it about 3 times, something black started appearing on the startup screen (7th image). It doesn't appear when playing YouTube or using HDMI (YouTube image is the 6th image, HDMI image is the 5th image). The cause is unknown, so I'm selling it as junk. There are no problems with sound, but those who don't mind this black thing during startup, etc., should be fine. Also, I've only confirmed the black thing during keystone correction, auto focus, and startup, but it may occur depending on how you use it or with certain apps. Also, there may be other defects besides what I've confirmed. For the above reasons, no returns or exchanges are accepted. The new price on Amazon was about 20,000 yen. This has an OS installed, so you can watch YouTube and Netflix on its own. 【1200ANSI・HDR10+ & High-Quality Large Screen】 The KATEIYOU projector boasts high image quality with a 1920x1080 Full HD native resolution, and achieves 1200 ANSI high brightness with the latest AI optical algorithm + German high-transmittance lens. HDR10+ support vividly reproduces details of light and shadow, allowing you to enjoy fade-resistant images on a 100-inch screen even in a daytime living room. 【With Dedicated Rotating Stand & Convenient to Carry】 Also works as a ceiling projection projector. Just rotate the stand, and you can project at any angle you like, on walls, ceilings, or floors. Without being obstructed by the room layout or furniture, you can turn your ceiling into a screen even in a small bedroom and enjoy large-screen movies while lying down. 【WiFi 6 & Two-Way Bluetooth 5.3 / Professional Audio System】 Equipped with Wi-Fi 6 for comfortable connection with iPhone, Android, and Windows. Bluetooth 5.3 supports AAC/LDAC codecs, enabling high-quality wireless connection with headphones and speakers. Equipped with HDMI, USB, and 3.5mm terminals, it can seamlessly connect to various devices such as Chromecast, PS5/Switch game consoles, and DVD players.