Makita 36V (18V X2) LXT Brushless 10″ Dual-Bevel Sliding Compound Miter Saw w/ Laser Kit, 5.0Ah Powered by two LXT? batteries X2 LXT? technology delivers more power, speed and run time without the hassles of a cord Makita built electronically controlled BL? Motor delivers 4,400 RPM for faster and smoother cutting The BL? Brushless Motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life Automatic Speed Change? technology adjusts cutting speed and torque during cut for optimum performance