When evaluating hair clippers for B2B procurement, focus on the motor type, blade material, and battery technology. For professional use, brushless motors are preferred for their longevity and high torque. Blades should ideally be made of carbon steel, ceramic, or titanium-coated steel to ensure heat resistance and sharpness retention. For cordless models, prioritize Lithium-ion batteries with at least 120-180 minutes of runtime and USB-C fast-charging capabilities to minimize downtime in a salon environment.