Bust a nut like never before! Your throbbing erection will enjoy one explosive orgasm after another! First, slide in your lubricated member into the chamber. Then squeeze the pressure bulb to create a sucking-sensation vacuum. Turn on the multi-speed vibrations––but wait––this stroker goes one better with a robotic stroker sleeve INSIDE the chamber! Tease and tempt your cock with any combination of vibration/stroking/suction-suck until you let loose that huge orgasm! Or for a "quickie” set this baby on "high” and enjoy cross-eyed ecstatic release––quickly! So powerful, it uses 4 big ol’ C batteries (sold separately). Protected by our Triple Guarantee––you must be happy with this product!