The 3-speed selector of dewalt 20v tools allows users to choose their speed setting based on application Brushless motor of dewalt oscillating tool delivers up to 57% more run time over brushed Dual-grip variable speed trigger of dewalt cordless tools gives users ultimate speed and application control Universal accessory adapter for use with most oscillating tool accessory brands Quick-change accessory system allows blades and attachments to be changed quickly without wrenches Bright led light illuminates dark work surfaces for accurate cutting