Technical Parameters Voltage: 110V/220V Frequency: 50/60 HZ Power: 100W Adjustable Speed: 400-8000 RPM Adjustable Pressure Range: 0-4 kg/cm² Product Size:29 x 13 x 21 cm Weight: about 9.5 kg Package Includes 1 x Double-Head Jewelry Pneumatic Engraver 2 x Pneumatic Engraver Handles 1 x Foot Pedal 1 x Filter 1 x Connection Tube 1 x Power Cord And Adapter 1 x Instruction Manual