Beurer MG13 Soft Waterproof Bath and Spa Massage Pillow with Vibration for Relaxation, Neck Pain Relief Bathing experience--Soft and comfortable to your head and neck, with Two Large Strong Suction Cups, tightly suctioned to the bathtub and lets you enjoy your bath more safely. Waterproof vibration massage pillow can be used in the bath tub. Provides relaxing vibration massage for the neck and shoulders, while taking a bath and it is an easy to use Soft and fluffy pillow cover provides a comfortable head rest. Easy one touch to turn on and off the vibration of the pillow. This is a battery Operated Pillow with a hidden pouch for the batteries making it easy to hide. Ultra-soft and smooth to the touch with more than 2" Luxurious Comfort with Polyurethane foam. Batteries are included and along with Beurers Limited Lifetime Warranty. Certain surfaces are not optimal for suction (e.g. tile, marble, travertine)