When selecting a machine, prioritize the Laser Source Type. For leather, a CO2 laser (10.6μm wavelength) is the industry standard as it is highly absorbed by organic materials, ensuring clean cuts without excessive charring. You should also look for a Power Rating between 40W and 100W; lower power is better for intricate engraving, while higher power is needed for cutting thick hides. Additionally, ensure the machine features a High-Precision Stepper Motor or Servo Motor to maintain a resolution of at least 1000 DPI for detailed patterns.