Specifications: Voltage:220-240v~50/60hz' Input Power:1500W No-Load Speed:150-305rpm Impact Rate:1380-2760bpm Impact Energy:2-15j Max. Drilling Capacity: Concrete:52mm Core Bit:125mm 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