It's powered by two 18V LXT lithium-Ion batteries sold separately for maximum performance and has an electronically-controlled BL brushless motor that matches torque and RPM to the application. 18V X2 means freedom from the cord even for demanding applications like cutting sheet and dimensional lumber that traditionally called for a corded saw. Best of all users can remain in one battery platform using the same fast-charging 18V batteries with the XSH06Z as they use across the expansive 18V LXT cordless tool system. The XSH06Z has a long list of features for efficient cutting without the cord. The electronically-controlled brushless motor delivers a full 6000 RPM for efficient cutting with automatic speed change technology to adjust the cutting speed and torque under load for optimum performance. In internal testing the XSH06Z made up to 610 cross-cuts per charge in 2x4 SPF lumber and up to 320 crosscuts per charge in 2x10 SPF lumber using two fully-charged 5.0Ah batteries. Added features include a large 2-5/8 inch cutting capacity at 90 degrees and an electric brake for maximum productivity. The saw has a die-cast magnesium base and blade guard with die-cast magnesium base blade guard and blade cover which combines durability with less weight only 10.5 lb with batteries sold separately. Added features include a built-in dust blower to clean the line-of-cut and a built-in tether notch tether sold separately.