18V X2 (36V) LXT BL Brushless Cordless 30 cm (12\") Chain Saw Captive nuts: prevent loss of nut when removing sprocket cover to replace guide bar or saw chain Brushless motor Variable speed control by trigger Constant speed control Electric chain brake Kickback brake Oil Capacity Display Ergonomic soft grip Large separate-type metal spike bumper. Spike grips work-piece firmly to provide more control. Adjustable automatic chain lubrication Lock-off lever Powered by two 18V Li-ion batteries in series to supply energy to the powerful 36V DC motor drive system. Main power switch with auto power-off function Battery protection system provides over-discharge protection for enhanced battery cycle life and overall battery life.