Brushless motor for improved efficiency, cooler operation, and longer tool life. • 1 × 5.0 Ah XR Li-Ion battery. Low: ~0-500 rpm. High: ~0-2,250 rpm. Key Features. Speed Settings: 3 Gear Speeds. Weight: ~2.1 kg when using 3-4-5 Ah battery; ~1.6-2.0 kg depending on battery size.