Playful designs and sized right for the beginner, intermediate or advanced users. Powerful vibrating stimulators with reversible rotating beads. 7 incredible functions of vibration, pulsation and escalation. 3 speeds of independent reversible rotation. 5 rows of non-jamming synchronized rotating beads. Easy push button controls with brilliant LED lights, hold for 3 seconds to turn off. Materials: TPE (vibrator) ABS (controller) Carbon Steel (beads). 3 AAA Batteries Required (Not Included). Dimensions: 4.75â   x 1.25â  /12 cm x 3.25 cm (shaft), 2â   x 1.25â  /5 cm x 3.25 cm (stimulator).