The DC390B is compatible with DeWalt's XRP batteries and the older NiCd batteries. 3,700 RPM for fast rip cuts and cross cuts. 6-1/2" carbide tipped blade for 2x cutting capacity at 90° and 45°. High strength magnesium shoe and upper guard provides increased durability. 0-50° bevel capacity provides additional capacity for a multitude of applications. Fan-cooled motor with replaceable brushes for maximum power and durability. Batteries and charger sold separately.