The Dual Vibrating Flexi-Dong is wireless and made of pliable soft jelly. The incredibly flexible double dong has an adjustable vertebrae and each dong has an insertable length of 7â  . The diameter of each vibrator is 1.625â   and is shaped like a penis to give you that real feel. The middle has a push button finger tip activation that allows for three separate vibration and pulsation options. The controller requires 3 AA size batteries, not included, to provide this double dong with powerful vibrations. Sometimes, it takes two to get the job done!