4v, lithium-ion, variable speed cordless rotary tool, quick & easy accessory changes, usb rechargeable battery, led battery life indicator, portable & lightweight, can be used with most dremel accessories & a selection of attachments, includes 1/16" engraving cutter, 3/8" aluminum oxide grinding stone, 3/8" brush wheel, 1/2" polished wheel, polishing compound, 1/2" sanding brand & mandrel, screw mandrel, wrench, accessory case, universal micro usb cord, 3.6v usb wall plug power supply, manual & quick start guide.