The Aqua Pump makes pumping a breeze with its easy to use controls and water pressure technology. To use, select one of the three pump sleeves provided, whichever provides the best fit, and place it around the base of the pump. Fill pump with a couple inches of warm water, then insert penis and press and hold the power button until the user reaches the desired level of suction. Press the bottom button to instantly release the pressure. To charge, remove the top control pack from the 8 inch tube. Then place the pin charger into the back of the control pack and connect the USB end into a power source.