POWERSTATE brushless motor supplies constant power for faster cuts and reduced heat for extended life. REDLINK PLUS intelligence provides optimized performance and overload protection using total system communication between tool, battery and charger. REDLITHIUM XC 4.0 battery pack provides superior pack construction, more work per charge and more work over the life of the pack. Features a keyless adjustable shoe, keyless QUIK-LOK universal blade clamp, integrated LED (light emitting diode) light, and a hang hook for convenient storage on the job. Includes M18 REDLITHIUM XC 4.0 extended capacity battery pack, M18 & M12 multi-voltage charger, blade, carrying case. No. 2720-21: Voltage: 18V, Battery Type: Lithium-Ion, Ampere Hour: 4.0 Ah, Stroke Length: 1-1/8 In., Strokes per Minute: 0-3000 SPM, Weight: 8.9 Lb., Dimensions: 18-1/2 In. L, Batteries Included: Yes, Charger Included: Yes, Case Included: Yes, Warranty: 5 Year, Pkg Qty: 1, Package Type: Box