1. Original Switzerland electro-motor
2. Drive-1:1 contra angle is available
3. Adjustable speed and torque
4. Auto reverse to protect the file
5. High capacity Li-ion chargeable battery and can work with battery or adaptor
6. Auto power off and memory function
7. Adaptor working voltage:AC100-240V, 50-60HZ
8. 9settings for adjustable rotational speed, ranging from 125 to 625rpm
9. Adjustable torque, range:0.3-5.2N.cm(3-52mN.m)
10. not including the contra angle