About This 【2.1 Joules Impact Energy】Cordless hammer drill has 2.1 Joules of impact energy for fast drilling, easily drill through concrete, brick and masonry. NOTE: Bare tool, not include the battery, if need battery search B0B24ZX5M9. 【Brushless & Powerful Motor】Powerful durable brushless motor with variable speed trigger that delivers 0-1400 RPM, 4,500 BPM in different modes. 【4 Application Modes】Mode in 1 knob to manually switch between hammer, drilling, chisel and rotary hammer for drilling on concrete, cement, brick, wood and rock. 【High-Efficient Work】SDS-Plus chuck for quick bit change. 360° auxiliary anti-vibration handle. Variable Trigger with forward & reverse switch optimizes the drilling accuracy. 【Ergonomic Design】Cushioned overmold grip for comfort & control Well. Vibration reduction mechanism reduces vibration felt by the user at the handles. 【Improved Visibility】Built-in LED Work light illuminate workspace without an additional light source. Overview Brand : Dong Cheng Power Source : Battery Powered Maximum Rotational Speed : 1400 RPM Voltage : 20 Volts Amperage : 3.99 Amps