Color classification:

Black carbon brush model-fast charge + suction blowing charge 4-in-1 + two-gear adjustment

White carbon brush model-fast charge + suction blowing charge 4-in-1 + two-gear adjustment

Black brushless model-fast charge + suction blowing charge 4-in-1 + two-gear adjustment

White brushless model-fast charge + suction blowing charge 4-in-1 + two-gear adjustment