Powerful Battery: With built-in rechargeable 2500 mAh battery fast charging in 3 hours can be used continuously for about 90 minutes after being fully charged. Easy to use: Aminleter Scrubs Brush Electric Spin Scrubber with 3 speeds up to 420r/min high rotation energy saving for cleaning up all the messy with Aminleter power scrubber bathroom clean shower scrubber more portable and faster to clean bathroom bathtub shower countertop stove sink window tile tub and so on. Making cleaning job easier! Warm Tips: Please fully charged the cleaning brush after first use.