Top technology from germany makes it possible: the massage bead vibrator with clitoral stimulation arm is innovatively controlled by biofeedback!simply Turn on with one button control and control the strength of the rotation (shaft) and vibration (stimulation arm) with your body. the harder the vibrator is pressed, the stronger the rotations or vibrations become. the high-performance motor itself responds to touch impulses and automatically increases the rotations and vibrations in the vibrator. no fiddling with the control knob, no interruption of lovemaking, instead determine for yourself how strong the joymatic should stimulate! Also ideal for training the pelvic floor muscles.total length 22.3 cm, ø 2.83.1 cm, clitoris retractor 7 cm long, ø max. 2.1 cm. silicone with polyurethane coating (soft touch), abs. all materials are phthalate-free according to eu regulation 1907/2006/ec.includes batteries and storage pouch in discreet white.