Powerful brushless copper motor: This electric concrete trowel features a 600-900W brushless pure copper motor that delivers consistent, robust power for intensive plastering, rendering, and wall smoothing without overheating. 6-speed adjustment: Equipped with an easy-to-use start switch, it allows seamless adjustment of polishing speed from 40 to 300 r/min to match different wall materials for optimal results. Dual high-capacity batteries: The cordless concrete polisher comes with two high-capacity 20000/30000mAh batteries, ensuring extended runtime for continuous work without frequent recharging. 45 cm cast iron blade: Features a 45 cm high-strength cross-axis blade forged from solid thickened cast iron for stable control and precise operation. The rotatable design with adjustable screw angle and included protective cover ensures safe use. Versatile for multiple scenarios: This wall smoothing polisher not only polishes concrete surfaces but also mixes concrete, mortar, paint, grout, mud, and plaster with the included mixing rod. Ideal for homes, decoration, construction sites, and more.