Specifications: Main Part Voltage: AC 110V/60H Power output: 15W Main Part Voltage: DC 3-12V Rotation: 4,000rpm to 30,000 rpm Sanding Bands: 80"/100"/120" Package include: Electric Nail Drill Machine : Main control + Hand piece Table Stand for hand piece Foot Pedal Power Control 30 x Electric Nail File Drill Bits (With 3/32" (2.35mm) shank size) 6 Optional Bits / Filing Heads (includes 1pc of emery rod with 4 sanding bands) 100 pieces of Sanding Bands with degree 80" 100 pieces of Sanding Bands with degree 100" 100 pieces of Sanding Bands with degree 120" Installation and wire connection: 1.Connect the 5-pin plug of the portable grinding head/hand piece to the output socket at the main panel. 2.Connect the pedal switch to the foot S/W socket. 3.Select grinding mould of different sizes according to actual requirements, and fasten/secure it into the front of the portable grinding head by turning the shaft lock. 4.Switch the speed control to the left. 5.Connect with the main source power. Operation Detail: 1.Press the function switch on the left to Hand for manual control, the indicator will be on and the grinding head starts to move slowly. The LED 1~2 will be on. 2.Turn the speed control to the right to accelerate the grinding head and all the LED indicators for the speed will be on. 3.When the function switch is pressed to the FOOT, step on the pedal the speed will be accelerated, and loose the foot, the speed will be decreased. (foot switch is optional) 4.The turning directions can be swapped: FWD means clockwise and REV means counterclockwise. 5.Adjust the speed of the grinding head within a reasonable range. 6.Please adjust the hand piece to the lowest speed before changing forward/backward direction or before turn off the machine.