DEWALT DCF887M2 20V MAX XR Li-Ion 4.0 Ah Brushless 0.25" 3-Speed Impact Driver Kit DEWALT built brushless motor (2) 20V Max XR Lithium-Ion(4.0ah) batteries delivers more run time and capacity Compact, lightweight design for tight spaces 3-speed settings for versatility with Precision Drive for added control (3) LED lights with 20 second delay after trigger release