Effortless Moving Helper: This electric stair climber has a max load capacity of 440lbs (200kg) and easily handles heavy loads up and down stairs. It supports slopes up to 30° and stair heights up to 9.1' (230mm). With two speed settings: fast at 50 steps/min and slow at 30 steps/min, and noise level 50dB (at 1m). For large items, two people are recommended for secure handling. Powerful & Long-Lasting: This electric stair climber features a 400W brushless motor for efficient, quiet performance. The detachable rechargeable battery supports climbing 1,600-1,800 steps on a full charge (300 lbs load at a 30° incline). An independent switch and battery indicator keep charging simple, while automatic edge braking ensures security. Built for Long-Term Use: Weighing 74.5 lbs, this electric stair climbing is easy to store. The 5mm aluminum frame ensures durability and heat dissipation, while the wear-resistant platform provides strong load capacity