Joymatic Touch Vibe BerryControl 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). Theres no messing about with buttons and no disruption to love making because can decide how intensely your Joymatic vibrator should stimulate