1. VACUUM ADSORPTION PRINCIPLE :Super strong suction cup sucker which diameter is large 2.8-inches,the of strong scalability,good air tightness of the silicone material,given it strong adsorption capacity. suction can bear 7.5 pounds maximum weight 2. SUPER EASY TO INSTALL: no tools need, it is self-priming installation without drilling, you only need to put the suction cup to grip the surface, such as glazed tile wall, mirror, glass, etc.suction cup shower head is easy to installation 3. PROBIDED ADJUST ANGLE CAPACITY:adjustable designed so that convenient to adjust the angle of showerhead on straight and adjust 30 degrees from the wall.The shower head holder is rotating 360 degrees . 4. REMOVABBLE DESIGN: Removable shower wand holder allows you to place the shower arm at any desired height for easy to access by relocating the shower head holder Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.