Limited to VGA (640x480). It looks grainy on 4K monitors.
Plug the camera in after the driver software finishes installing. 🛠️ Quick Specs Interface: USB 2.0 Sensor: CMOS 0.3MP Frame Rate: 30 fps Extra: Snapshot button for quick photos. A4 Tech Pk 635M Kamera Driver Vista
If the installer fails, right-click the .exe , go to Properties , and set compatibility to "Windows XP SP2." Limited to VGA (640x480)