Enjoy the look and feel of the Glow In The Dark Humm Dinger. This vibrating penisring and clitoral stimulator has powerful vibrating and pulsating action for his and her pleasure! It's multi-orgasmic with an easy on-off rotating dial that offers 20 minutes + of continuous action. The Humm Dinger is made of a super stretchy material that offers a one size fits all capability. Batteries included.