Waterpik SM451 Shower Massage The Waterpik SM451 features the design of the shower head that started it all. Featuring Waterpiks massage technology, it offers a revitalizing and invigorating shower from any water pressure. With multiple settings, you can change between a gentle spray to a highpressure massage depending on your mood. With a handheld design and a fivefoot hose, you will have plenty of freedom in the shower. Experience the pleasures of a custom shower provided by Waterpiks Original Shower Massage, and you will never go back to an ordinary shower head again.