【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. 【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. 【Optimal Configuration】Fade-free power battery pack with integrated 4-Bar fuel gauge displays the power level of battery charge and usage. 【Compatible 20V Platform】Powered by the DongCheng 20V Max Lithium-Ion battery platform, easily share batteries across the entire DongCheng 20V Max family of power tools. 【Package Included】(1)20V Max Rotary Hammer, (4)SDS-Plus Drilling/Drill Bits, (1)4.0Ah Li-ion Battery, (1)2A Charger, (1) Heavy-Duty Plastic Box, (1)User manual. DongCheng 20V Max Cordless Rotary Hammer Drill The DongCheng 20V Max Cordless Rotary Hammer Drill is engineered for demanding construction tasks, offering robust performance and user-friendly features. Key Features: High Impact Energy: Delivers 2.1 Joules of impact energy, enabling efficient drilling through concrete, brick, and masonry. Brushless Motor: Equipped with a durable brushless motor that provides variable speed control (0-1400 RPM) and up to 4500 BPM, ensuring versatility across various applications. Four Application Modes: Easily switch between hammer, drilling, chisel, and rotary hammer modes using a single knob, accommodating tasks on concrete, cement, brick, wood, and rock. SDS-Plus Chuck System: Features an SDS-Plus chuck for quick and secure bit changes, enhancing efficiency during work. Ergonomic Design: Includes a 360° auxiliary anti-vibration handle and a cushioned overmold grip for improved comfort and control during extended use. Built-in LED Light: Provides illumination in low-light conditions, enhancing visibility in the workspace. Battery and Charger Included: Comes with a 4.0Ah battery and charger, ensuring extended runtime and quick recharging.