When evaluating laser pointers, the most critical factor is the Laser Class (Class 1, 2, 3R, 3B, or 4), as this determines both safety and legal compliance. You must verify the Wavelength (nm); for instance, 532nm (Green) is significantly more visible to the human eye than 650nm (Red). Additionally, check the Output Power (mW)—standard presentation pointers are usually <5mW, while industrial or astronomical versions may require higher power. Ensure the Housing Material is made of Aviation-grade Aluminum for heat dissipation and durability, and confirm the Battery Type (rechargeable Lithium-ion vs. AAA) to match your target market's preference.