Eva is a hands-free vibrator that provides clitoral stimulation during sex. The unique, flexible wings keep the vibrator in place by comfortable tucking under the labia. This gives you stimulation that you seek while freeing up your hands to do whatever else they like. If you end up in an adventurous position (like you sometimes do), all it needs is the help of a single finger to stay in place. Eva is a one-size-fits-most product and your experience may vary. Rechargeable. 3-speed motor functions.