Toolless blade change system. (with electronic control + speed dial). Electronic speed control maintains consistant speed set for various workpiece. 3 orbital settings plus straight cut. Built-in LED job light for easy tracing of cutting line. Plastic cover plate can be attached without tool. Low vibration and low noise level. Double Insulation, Variable Speed, Orbital Cutting, Bayonet Shank, Dust Collecting, Soft Start, Constant Speed, Built-In Light and Carry Case. Blower function removes sawdust Can be used with optional guide rail.