The Vibra Slim Plug's inner weight rolls with your movement to stimulate muscles and add sensation! Its silky smooth Ultrasilk™ warms with your body heat beautifully. Your motions propel a ball bearing inside this smooth silicone with a comfortable anchor base plug perfect for adding new sensations. This plug has a 3.5 inch length (2.75 insertable inches) and a 1 inch width for the perfect size during play. Made with smooth, body-safe Puria™ silicone, this plug contains no phthalates, paraffins, or latex.Pure platinum cured Puria™ silicone, Ultrasilk® smoothWater based, hybrid lube safeMotion activated vibrations via movement of an inner bearingThoughtfully designed anchorTech™ Base for safety, comfort and wearabilityStayput™ Design keeps product securely in placeLength 3.5 inch / 8,8 cmInsertable length 3 inch / 7,6 cmWidth 1 inch / 2,5 cm Does not require batteries