Elec Micro NX Electric Motor Built In: - Worlds smallest and most powerful electric motor - Longer lifetime (brushless ?Micromotor) - Strong cutting power and stable torque output - Speed. Max. 200,000 RPM (1:5 speed increasing handpiece) - Powerful optic motor(25,000 ~ 33,000 LUX optic motor) - Memory function: By using M1 ~ M3, 3 memories can be saved. - Which allows users to save and load their own personal settings instantly. - Transmission ratio preset 1:1 1:5 16:1 20:1. - Forward /reverse. - Suitable for all types of dental chairs. **For further product information, please contact Chat Support**