Vibration function / Uses 2 AAA batteries (sold separately)]##Double motorized vibrator with super strong vibration that you would never guess from its compact handy size! #Medical grade silicone body gives the best insertion feeling. #The simultaneous stimulation of the G-spot and C-spot by the double vibration of the rod and the child unit is sure to be addictive! 7-pattern vibration###Waterproof for daily use###Quiet design