20V Cordless Impact Driver 

Hex-drive chuck : 1/4'' quick connect 
No-load speed (rpm) : 0-1200/0-1800/0-2500
Impacts per minute (bpm) : 0-1600 / 0-2300 / 0-3200
Max.torque (N-m) : 158
Battery voltage : 20V / 2.0Ah Li-ion 
Weight (kg) : 0.96 (without battery)