[Meet Your Needs & Dual-speed Versatility] Choose the right gear of this juicer machine to make it work more efficiently and save your money. “Ⅰ” low speed runs from 12000 to 15000 RPM. “Ⅱ” fast speed runs from 15000 to 18000 RPM. Suggestion: “Ⅰ” speed for soft and juicy fruits and veggies, like oranges, cucumber, tomato, watermelon, beets, kale etc. “Ⅱ” speed for hard fruits and veggies, like apple, carrot, ginger, celery etc. But little water fruit are not suitable, like bananas, potato.