Electronic - Speed preselection for adjusting to suit any application. Constant Electronic - Power booster for heavy loads. Constant speed, even under load. SDS-max toolholder - Optimum power transfer. For Rotary Hammers and Demolition Hammers from the 5kg class onwards. Features and Benefits: Extreme impact force of 16.8 joules for high material removal rate. Low-vibration in operation and no-load. Low feed pressure, for fatigue-free working. Wide sliding switch for convenient switching on and off. Variable chisel fitting in 12 positions. Auxiliary handle can be adjusted and rotated 360. SDS-max toolholder with integrated dust protection. Large-volume carrying case. Service display indicates an impending carbon brush change.