This is the information that I found about this unit:

The GooDee YG600 is a budget-friendly portable projector designed for home theater, outdoor movie nights, and casual multimedia use. It's manufactured by GooDee (also stylized as GooDee or Goodee), a brand focused on affordable projection technology since around 2018. The model supports Full HD 1080p resolution (native 1920x1080 in upgraded versions like the YG600 Plus) and is marketed as a 4K-supported device, meaning it can upscale or decode 4K content but doesn't natively project at 4K.Key Features
  • Resolution and Image Quality: Native 1080p Full HD with support for 4K input decoding, delivering sharp images for movies, gaming, or presentations. It has a high contrast ratio (up to 3000:1 in some variants) for better visibility in low-light or semi-outdoor settings like backyards or garages.
  • Brightness: Typically rated around 600 ANSI lumens (or higher in upgrades), making it suitable for dark rooms or evening outdoor use but not ideal for bright daylight.
  • Screen Size: Supports projections up to 230–400 inches, with a zoom function (50–100%) to adjust size without moving the unit.
  • Connectivity:
    • Wireless: Dual-band 2.4G/5G WiFi for screen mirroring from smartphones (iOS/Android) and Bluetooth 5.0/5.4 for connecting external speakers or headphones.
    • Wired: Multiple ports including 2x HDMI (for TV sticks like Fire Stick, PS4/5, or laptops), 2x USB, VGA, AV, and sometimes an audio out.
  • Audio: Built-in dual 5W Hi-Fi stereo speakers with Dolby Audio support for clear sound, though many users pair it with external Bluetooth speakers for better immersion.
  • Keystone Correction: 4-point/4D auto-adjustment to fix distorted images if the projector isn't perfectly aligned.
  • Other Specs: Portable design (compact and lightweight, around 5–6 lbs), low fan noise in newer models, and compatibility with streaming devices, USB drives, and PPT presentations. Some variants include smart features like built-in Netflix/Prime Video support (e.g., YG600-Movin).
  • Power and Cooling: Uses LED light source for longer lamp life (up to 50,000–100,000 hours) and an efficient cooling system to reduce noise and heat.
NOTE:  I am selling this for a family member who never opened it.  I don't know a lot about it, aside from what I researched above.