Professional Nail Drill Machine for home use or beauty salon. HOW TO USE Step 1: Plug in Step 2: Control the FORWARD/OFF/REVERSE button in the middle of the electrical cord to turn on/off. Step 3: Control the SPEED SWITCH in the middle of the electrical cord to adjust speed. SPECIFICATION Input Voltage Range: 110V Output Voltage:DC 12V Output Current: 1000mA Speed: 0-20,000 RPM (adjustable) FEATURES 1.Portable and lightweight 2.Quiet and sturdy hand piece 3.Adjustable speed and rotation direction 4.Efficient heat dissipation 5.Easy to carry and operate ADVANTAGESProfessional: High quality bearing and motor, high torque and low noiseHigh Speed: Adjustable speed up to 20,000 RPM Forward and Reverse Direction: Two-way switch Quiet and Safe: Smooth operation with low vibrationLow Heat: Aluminum body for efficient heat dissipation Vogue and Portable: Compact design, easy to carry and operatePerfect Accessories: 11 types drill bits meet all your needs WHAT YOU GET 1 x Nail Drill Machine 1 x AC adapter 1 x User Manual 11x Drill Bits 100 x Sanding Bands with Degree 80" ATTENTION PLEASE To extend the machine life, please turn off the main board power when changing nail drill bits. Please don't rotate to open the drill body,that will damage the electric machinery. Don't change the turning directions too frequently,in order to avoid the hand piece being damaged. To prevent overheating, No More Than 20 Minutes of continuous use each time is recommended. While using,please adjust the speed gradually,do not adjust speed suddenly.