Trembling thrills for partnered pleasure Enhance the sensations of partnered pleasure, for the ultimate addition to your sex life. Specially designed for a natural fit, the Smart Vibe Ring from TENGA is elegant yet extremely powerful, with a rechargeable motor that lasts for up to an hour at full strength Shake things up with this lightweight accessory Measurements: 3.54 inches in length, 1.49 inches in width. Material: Silicone, ABS. Color: Black. Note: Charges via USB.