The frequency can reach 3100-3600 times per minute, which improves the efficiency of polishing and saves time. Equipped with a dual function switch for forward/reverse action and quick lock function, allowing you to easily switch between sanding movements. Power supply: AA battery (not included) : shaping body putty, removing paint, rough feather edges, priming/sanding metals, hobby work, etc. Provides exceptional sanding performance, so you can get the job done quickly, saving you time and money., Weight: 0.14770971554 pounds, Manufacturer: Rtxbvg