Rated voltage: 20V 
NO load speed: 0-1800 / 0-2300 / 0-2800rpm
Max. torque: 550 N.m
Impact rate: 0-1800 / 0-2200 / 0-3000bpm
Driving shank: 1/2''Dr
Sound pressure level: LPA(dB(A)) LPA: 82dB(A)
Sound power level: LWA(dB(A)) LWA: 95 dB (A)
Vibration level ah=11.2m/s 2 K=1.5m/s2
Battery pack-Rated 20Vd.c. 4.0Ah Li-Ion battery
Battery Charger-Input voltage: 100-240V AC, 50/60Hz, 105W Output voltage: 21V d,c, 4.0A
Charging Temperature: 0 - 45
Charging time: 1 H