In order to extend the time， enhance sexual activity is the main purpose of joy. Shock bump ring device of the shock will be contacted on the female clitoris， allows women toincrease sexual stimulation， stimulating activity， enjoy orgasm. Function of the vibration cycle can help men to enhance self-confidence， improve the hardness and durability. The battery can be replaced， there is plenty of time for vibration time before sex and sex of theguarantee， and after caressing foreplay helps