Powered by two LXT batteries to deliver more power， speed and run time without the hassles of a cord. Electronically controlled BL Motor delivers 5100 rpm for maximum performance and longer run time per charge. The brushless motor eliminates carbon brushes， enabling the motor to run cooler and more efficiently for longer life. Automatic Speed Change technology adjusts cutting speed and torque during cut for optimum performance. X2 LXT technology delivers up to 558 cross-cuts per charge in 2x4 SPF lumber and up to 291 cross-cuts per charge in 2x10 SPF lumber using the two 5.0Ah batteries. Large 2-9/16 In. cutting capacity at 90 Deg. Cuts 3X material in a single pass. Electric brake for maximum productivity. 0 - 53 Deg bevel capacity with positive stops at 22.5， 45， and 53 Deg. Die-cast magnesium base and blade guard along with a die-cast aluminum blade cover and motor housing provide a lightweight， durable design. Compact and ergonomic design at only 17-1/2 In. long. Weighs only 12.4 Lb with batteries for reduced operator fatigue. Ideal for framers， formers， builders， roofers， and more. Retractable， extra-wide tool hook secures the tool when not in use. Built-in tether notch (tether sold separately). Rubberized soft grip handle provides increased comfort on the job. Extreme Protection Technology (XPT) is engineered for improved dust and water resistance for operation in harsh conditions. 3-stage LED (light emitting diode) gauges on the tool indicate battery charge levels. Equipped with Star Protection Computer Controls to protect against overloading， over-discharging and over-heating. Dual Port Rapid Optimum Charger charges two batteries at the same time. The Dual Port Rapid Optimum Charger communicates with the battery's built-in chip throughout the charging process to optimize battery life by actively controlling current， voltage and temperature. For more efficient charging， the Dual Port Rapid Optimum Charger has built-in fans to cool the batteries faster. 18V LXT Lithium-Ion 5.0Ah batteries (BL1850B) reach a full charge in 45 minutes or less. Compatible with Makita 18V Lithium-Ion batteries with a Star symbol. Includes 18V X2 LXT (36V) Brushless Rear Handle 7-1/4 In. Circular Saw (XSR01Z)， (2) 18V LXT Lithium-Ion 5.0 Ah Battery (BL1850B)， 18V LXT Lithium-Ion Dual Port Charger (DC18RD)， 7-1/4 In. 24T Ultra-Coated C.T. Saw Blade (A94530-A)， Wrench (783204-6)， Tool Bag (831271-6).