With two powerful nipple suckers and a clitoral cylinder sucker, this combo targets the most sensitive erogenous zones with pump less suction. Place the clear cylinders over nipples and clitoris and lower the suction dials counter-clockwise until they are flush with the skin. The smooth cylinders feel great and stay put.Apply a gentle amount of pressure to the cylinder to ensure a tight seal and twist the top clockwise to activate the suction. With each turn of the twist dial, the suckers will increase blood flow to the focused area and increase sensitivity. Once you unscrew the dial and relieve the pressure, nipples and clitoris will remain perky and extra sensitive.