NOBU: MAYA has an exclusive sound-sensitive sound system response, increases the intensity of the vibration with the ambient sound and the music detection, with a built-in sensor. Maya is made of high quality, odorless, body friendly, silicone. Atomic vibration with a powerful motor. Selection of 10 vibration levels is activated at the touch of a button. Waterproof and rechargeable via USB cable. The Li-ion battery allows up to 3 hours of autonomy between charges. Length: 21cm Diameter: 2-4 cm.