The Cal Exotics Gyration Sensations Gyrating Hummer is an extreme vibrating and throbbing massager with famous scoop design and love nub. It has 10 powerful functions of vibration. pulsation. and escalation. Has push button control. just hold the button for 4 seconds to turn off. The Hummer features a memory chip that resumes on the last function used. Also has a silky smooth satin finish. ABS with PU Cote (massager) ABS with Silver Plating (decor ring) TPE (button). 6.25' x 1.25'/16 cm x 3.25 cm. Uses 2 AA batteries. not included.