The ball-shaped design, made from safe and soft silica gel provides close contact and, as it can be operated hands-free, has a maximised range of contact. Special mechanisms like the double springs increase the intensity of the vibration and ensure a perfect combination of vibration efficiency and shock absorption. The novel temperature control technique improves the osmotic force of vibration to ensure muscles relax quickly. With the additional massage heads, Cat and Rabbit, Emma has six vibration modes in order to provide a pleasant massage experience.