[VERY IMPORTANT STEPS]: step-1>> Wipe the walls with paper and dry towels. step-2>> Remove the suction cup film. step-3>>Pull the protruding part up,tighten the wall and squeeze the air from the suction cup.Wait 10 minutes before using. step-4>>Attach the shower head to the holder and turn the top disc clockwise to tighten. [Great Adsorbability]: The suction of this suction cup shower head holder is 2-3 times that of ordinary suction cup. If the concavo convex surface is less than 1cm, it will automatically fill. Waterproof moisture, more solid adsorption, not easy to fall off. [Scope of application]: The universal shower holder is suitable for flat and smooth surfaces, ceramic tiles, smooth glass, stainless steel ect. Scope: The shower holder is suitable for flat and smooth surfaces, ceramic tiles, smooth glass, stainless steel ect. Wooden surface, granite, the wallpaper, painted wall, latex paint, natural marble and other non-smooth walls, need to use auxiliary stickers. Provide auxiliary stickers. [Easy to install and Reusable]: Without drilling, simple and easy installation and use effortlessly and quickly, leaves no marks after removing the bracket. You can replace the shower or bidet holder anywhere, so that the holder can be reused and disassembled. Raised or low bath position for children or parents who cannot reach the shower head.