Toolless blade change system. (with electronic control + speed dial). Electronic speed control maintains consistant speed set for the various workpieces. 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. The blower function removes sawdust Can be used with the optional guide rail.