Feature: 1. Auto Reverse: In the process of expanding the protaper, if the torsion exceeds the set value, the electric motor will automatically reverse to prevent side penetration and needle broken. 2. Easy Adjust: Contra angle low speed handpiece adopted 9 gears design, allow you can easily adjust speed, torsion and Angle according to your needs, which is convenient to use. 3. 16:1 Design: Contra angle reduction handpiece adopted 16:1 ratio design, with low noise and high efficiency motor, which is a wonderful and practical dentist tool. 4. Clear Display: Reduction dental handpiece has high definition LED screen to display machine work state, which has 3 different modes for you to choose according to your needs. 5. Excellent Stainless Steel: Contra angle reduction dental handpiece made of stainless steel material, firm and sturdy, rust proof and corrosion resistance, high hardness and durable. Specification: Item Type: Contra Angle Low Speed Handpiece Material: Stainless Steel Battery: Lithium battery 950mAh(Included) Mode: Intelligent reversal, root expansion function (speed 120-500rpm, torsion 0.6-4.0N) Reciprocating operation, single file function (speed 200-400rpm, torsion fixed) Intelligent reversal, needle withdrawal function (speed 120-500rpm, torsion 0.6-4.0N). Package List: 1 x Host1 x Contra Angle Head1 x Wrench 1 x Oil Filling Auxiliary Accessory2 x LED Light Source Accessories 1 x Charging Base 1 x USB Charging Cable 1 x Instruction