eRoller - Portable electric powered car wash roller brush - Motorized auto wash Sponge scrubber Light weight and durable: 2 pounds, made of aluminum alloy and soft covered. Powerful enough: Different from flow-thu brushes, the electric motor inside carries enough power. Waterproof: The whole body of eRoller is waterproof except the in-car cigarette lighter plug. Soft cover: The soft covered pole can work as grip for easy handling and bring you a soft feeling. Step-less speed control: It allows you to select different speed and power for different usages.