Model: RH1700558 Specification Rated Voltage: 220-240V~50/60Hz Input Power: 1700W No-load Speed: 100-220 rpm Impact Rate: 1750-2150 bpm Impact Energy: 5-19 J Maximum Drilling Capacity: Concrete: 55 mm Core Bit: 150 mm Chuck System: SDS MAX Features: Constant electronics power for consistent performance Variable speed control for optimal operation Chisel-locking system for easy tool changes Double anti-vibration system for reduced user fatigue Indicators for power supply and carbon brush maintenance Comes with 1 set of extra carbon brushes Packed in a carrying case Warranty: 6 months parts & service warranty Quality guaranteed, original INGCO product