115 mm (4 1/2"), 18 V, 8500 rpm, slide type on/off switch and anti-restart function, automatic speed control: automatically changes the cutting speed according to load condition for an optimum operation, high efficiency and more work amount by brushless DC motor, handles heavy load with excellent cooling function, enhanced dust and drip-proof performance, 2x battery 4.0Ah Li-ion, 1 charger, 1 Makpac case, machine weight: 2.3 kg