Specifications: Voltage:220-240V~50/60hz Input Power:1200W No-Load Speed:235-514rpm Impact Rate:1350-2950bpm Impact Energy:2-10j Max. Drilling Capacity: Concrete:42mm Core Bit:90mm Sds Max Chuck System Constant Electronics Power Variable Speed Control Chisel-Locking System Double Anti-Vibration System Indicator Of Power Supply Indicator Of Carbon Brush Maintenance With 1 Set of Extra Carbon Brushes Packed By BMC