Easy to use: If it cannot be turned on after charging, please try pressing the power button for more than a few seconds or even more than 10 seconds to turn it on. Do not open the product while charging as this will extend the life of the product. If you have any questions, please contact our customer service.Unlike other electric scrubbers that have only one speed and limited power; the kHelfer Electric Cleaner features 2 adjustable spin speeds to clean soap scum, grout, or tough stains in just minutes. .Power on To activate 350 RPM low speed mode for daily cleaning, press 2-4S or click again to switch to 400 RPM mode for deep cleaning.The kHelfer rotating shower brush comes with 4 removable brushes, domed brush for cleaning bathtubs and toilets; large flat brush for showers and floors; small flat brush for fine work; corner brush for detail work. The baseboards and door frames are covered with deep grout. Each brush reaches deep into corners to effectively remove grout and stains.Bending over to clean can be torture for people with bad backs or weak knees. The shower cleaning brush extends to 3 lengths so you can scrub your tub and floors without bending or kneeling. All you have to do is hold it and it does all the work for you!Cleaning Device: Unlike others, the angle of the brush head is adjustable and flexible, no need to bend down or change position when cleaning, and this rotating electric cleaner can be suitable for various hard-to-reach objects, such as hollow shower heads Or faucet.The bathtub bristles are made of durable hard PP material that won't fall off easily, ensuring you can easily clean tough stains without scratching your bathtub or tiles. IPX7 waterproof function ensures safety for daily use and extends service life.