1. 2 x 21V 4Ah Batteries: The cordless angle grinder is equipped with two large-capacity 21V 4Ah lithium-ion batteries and a fast charger tested for multiple charging cycles, with charge and discharge protection. This allows for all-round daily use. 2. High-performance motor: The angle grinder is equipped with a powerful brushless motor and a high-quality copper core motor. It offers an ultra-fast no-load speed of 9,000 rpm for smooth and effortless cutting and grinding, preventing burns. Optimal and three-dimensional heat dissipation for optimal motor protection. 3. Brushless and cordless: The brushless motor of the angle grinder eliminates carbon brushes. The cordless design of the angle grinder makes work easier and improves efficiency. You can work anywhere, even outdoors, without a cable reel or power outlet. 4. Easy to use: The angle grinder has a small handle, light weight, easy outdoor use, and a non-slip handle, effectively reducing fatigue during use. Slide switch: