I purchased this small projector in June 2023. I've used it less than 10 times, so it's practically new. I've confirmed that it works. (Used to project a 60-inch image from a distance of about 2 meters) I've confirmed HDMI video and audio input and output. I've confirmed USB music input and output. I've confirmed audio output to headphones via the audio jack. I've confirmed the operation of the main unit buttons and the remote control. I believe it's in good working order, but please understand that I haven't tested every single function. The main unit and power adapter get hot during use, so I recommend using it continuously for about 2 to 3 hours. The cooling fan makes some noise, but it didn't bother me much. It's a matter of personal preference, but it's similar to the sound of a USB fan. As a bonus, I'll include one HDMI cable and a connecting adapter, so you can set it up right away. Two cables in total: approximately 1.4 meters and approximately 1.8 meters. Home Theater Home Projector Mini Projector Small Projector Nintendo Switch PlayStation PS Blu-ray Recorder BD Recorder