The ZOLO Jerkmaster is the ultimate stroke and suck masturbator designed for unparalleled pleasure. Adjust the vibrations and suction modes, or turn on the warming function for a truly customizable experience The multi-ribbed sleeve with soft and nubby textures enhances pleasure. The fully manual pressure trigger allows you to control the pressure and thrusting speed. Five suction modes and five vibration patterns combine to make ten unique functions. The Jerkmaster is USB rechargeable and is made from hypoallergenic materials.