The materials used for the Footsiebath of Beverly Hills were chosen to make the tub as light as possible when full of water, making the walk from the sink to the station less of a strain. The bowl is 6" deep, allowing enough room for the proper amount of water to give a theraputic soak and easily wash away foot treatments such as masks, scrubs and creams without spilling over. The liner, designed for one-time use, is perfectly prefitted to the tub for a professional look. To prepare for the pedicure, put in a clean, fresh liner and you're ready to go. When the pedicure is done, empty the water and dispose of the liner. No more cleaning. Retractable Cord: With the simple push of a button, the generous 7-foot cord smoothly retracts into the base. Vibration Noise Reduction System: Soothing vibration without a lot of noise. That is what the Footsiebath 'noise reduction' system does. 4 Position Control Knob: Heat, Vibrate, Heat & Vibrate, Off. The variable heat control knob allow you to customize the temperature for your clients. The additional heating elements prevent early 'burn out' of the heating elements and protect against total system failure, thus extending the life of the product far beyond other foot baths on the market today.