Underscore 60-in x 36-in Oval Drop-in VibrAcoustic + BubbleMassage Air Bath Relax your body, calm your mind, and lift your spirits in a luxurious Underscore bath combining BubbleMassage hydrotherapy with KOHLER's VibrAcoustic sound technology. Hidden speakers emit sound waves that envelop and gently resound within the body. Choose a soothing spa session with built-in compositions, unwind to your own music playlists, or catch up on news and podcasts. Meanwhile, BubbleMassage jets release thousands of air bath bubbles to cushion and massage your body, and Zones of Control lets you target the massage to where you need it the most. VibrAcoustic calms and soothes with sound vibration technology. Six concealed speakers send sound waves through the water to gently massage the body. Four original instrumental compositions offer different levels of relaxation. Plug in your smart phone, tablet, or MP3 player via auxiliary-in cable. Add your own receiver to stream wirelessly via Bluetooth.