1.Ergonomic design easy to carry 2.When operating, using mini push button20:1(left and right reciprocating) dental contra-angle handpiece to coordinate the machine files(hand files)PS: The item comes with 16:1 only 3.There are 6 kinds of procedures(Memory set) for selection. It can input the optimum data in advance, and also can modify it according to the working conditions in use. 4.Soft start and soft stop can be achieved and the operation is more comfortable. Simultaneously, it will not break the needle when root canal files encounter instantaneous shock. 5.Dental contra-angle Handpiece and lamp holder can withstand 135°C high temperature and high pressure sterilization. 6.Built-in high-capacity lithium battery, so it can reduce battery change times and reduce costs for machine. 7.There is a voice prompt when lack of power. 8.With LED lamp and high brightness, it can help doctors get a better look at the root canal environment. 9.Torque(N.cm)：0.6-4.0 10.PRM:150-500 Technical Specifications: Main engine Voltage: 3.7Vdc Battery capacity: 800mAh Charger input voltage: AC110-220V,60/60Hz Charger output voltage:5Vdc input voltage: 1A Packing list: The host 1 Charging Dock 1 Lamp holder 2 Power adapter 1 Motor cover 1 Product specification 1