Key specs include the Laser Class (typically Class II eye-safe), the number of laser lines (more lines generally mean faster scanning), and the Resolution (point distance). Ensure the device supports multiple working modes, such as a 'Deep Hole Mode' for complex geometries and a 'Fine Scanning Mode' for intricate details. Additionally, verify the software compatibility; the scanner must output standard formats like STL, OBJ, or PLY to be compatible with mainstream CAD/Inspection software like Geomagic Design X or Catia.