VEVOR Rotary Hammer Drill, 1-9/16 in SDS-Max Cordless, Heavy Duty 20V Battery Powered Rotary Hammer, Including 2 Batteries, Charger, Drill Bit, Pointed Chisel, Carrying Case, for Concrete, Masonry Reliable Power for Every Job One Machine, Endless Possibilities Smarter Power Management Small Features, Big Difference From Wood to Concrete, It Gets the Job Done Tidy Storage & Easy Portability Impact Energy: 7J,Item Model Number: BL-DC3805/20V-MT,No-Load Speed: 0-500 RPM,Impact Frequency: 0-2700 BPM,Interface Type: SDS-Max,Net Weight: 13 lbs / 5.9 kg,Power: Max.600W