To use it simply lube up your penis and place it into the casing and the protective sleeve. The sleeve, by the way, includes special nubs on it that will enhance the sensation from the vibrations. Once inside you adjust the internal ring around your shaft, by using the slider on the outside of the tube. Place it around the sleeve and your cock. This is going to help because it's the ring that will stroke your cock. When you turn on the device with the remote control, the machine will begin to stroke and suck your cock. Use the slider to determine the stroke level that you desire. When you move the second slider, the RoboSuck will then begin to vibrate, so move that slider until you find the right vibration level. Product Highlights: