With its powerful vibrations and sexy blue design this vibrating male masturbator has 5 functions of speed and pulsation for a custom fit of vibration and intensity. The removable bullet can be used separately for experimental solo play or for fun with a friend. The tunnel is designed with tight entry to grip and ridges to hold on and combined with natural feeling CyberSkin this stroker is a masterful creation of sleek powerful satisfaction. Uses one 9 volt battery.