Review on 🛀 Ultimate Foot Spa/Bath with 36 Massage Rollers, Heat, Infrared Bubble & Temp Control - Includes Medicine Box and 10-in-1 Pedicure Kit - Relaxation Guaranteed! by Leslie Harris

So the bubble function is in the middle and only offers sound functionality. That doesn't make it a spa, and neither does a red light. A special feature of the massage are the rollers on the bottom, along which you move your legs back and forth. If you don't feel like constantly moving your feet back and forth while trying to relax in a foot spa then this is for you, but if my feet hurt or hurt, the last thing I want to do is move her all the time to numb the pain. If the bubble were under your feet you would at least feel a slight tingle, but it's the bubbler in the center that creates the sound effects. Heats the water well, but if you're careful, the water in the middle, which is the only spot that gets hot, gets a little hot, requiring you to move your feet to spread the heated water. Unfortunately I never got around to trying this until the return window closed.