It's a beautiful item, used only for a few hours. Operation confirmed. APEMAN Small Projector LED 4000lm 1920×1080 Maximum Resolution Built-in Speaker LCD Keystone Correction LC350 【4000lm & High Image Quality】 The APEMAN small projector uses an advanced optical system and engine. 【Large Screen & Focus Adjustment】 With a projection distance of 1.1 to 3.8m, you can project a large screen of 34-180 inches. 【Cooling System & Two Built-in Speakers】 The APEMAN small projector uses the latest cooling system, and the fan operates to cool the main unit, which also excels in noise suppression. It is equipped with two 2Ω 2.5W built-in speakers, and you can experience high-quality audio and movies with stereo audio alone, without connecting external speakers. 【Multi-functional Interface】 It is equipped with input terminals such as HDMI / AV / VGA / USB / SD card, and can be connected to various peripheral devices such as PCs, game consoles, and USB memory.