Control the intensity of the vibrations by squeezing (biofeedback)! Intelligent, high-quality technology from germany makes this possible. just press the button to turn it on – the vibrations will start on the lowest setting and can be adjusted with slight squeezes (with the hand, fingers or intimate muscles). there’s no messing about with buttons and no disruption to love-making because can decide how intensely your joymatic vibrator should stimulate you! The stronger you squeeze, the more intense the vibrations from the long vibrator will be. the vibrator also has an indented area for the clitoris. you’ll probably have never experienced vibrations like these that match your needs before, whether it's for full-body massages or for stimulating specific pleasure spots like the clitoris or nipples!complete Length 15.8 cm, ø 3-4.4 cm. silicone with a polyurethane coating (soft touch), abs.includes a storage bag in a discreet white colour and batteries so that you can try out the biofeedback as soon as the toy arrives.