Red Light Design The RENPHO foot bath massager is designed with a red light that improves the environment in the basin, making cleaning easier. Removable Medicine Box For greater relaxation needs, an herb box is designed to hold and release items such as tea, etc. Easy to Move The wheels on the base allow you to easily move the foot spa tub anywhere in the house. Easy to Pour The drain valve makes it easy to remove water after the massage is finished. Who is it suitable for? What size foot does it fit? Our foot spa for elderly people, insomniacs, athletes, people with cold feet, etc; And it fits the largest feet size is 13in/32cm. How many functions Renpho foot bath have? This foot spa and massager has many useful functions, self heating, massage rollers, spa bubbles and Infrared light. How many massage modes Renpho electric foot massagers have? In total 3 massage modes: continuous rolling, regular time intervals and unequal time intervals. You can choose as you need. The temperature is adjustable? Yeah! With PTC heater system it heats up quickly and maintains a constant temperature. You can choose the heat you want from a range of 95°F to 118°F (35℃ to 48℃).