The Iroha Rin’s shape is easy to hold and the soft spherical tip provides brand new sensations. Simple one button control cycles through 4 vibration modes. 3 vibration and 1 pulsation. Fully waterproof. Size (D à W à H inches): 1.38 à 1.38 à 5.83 Materials: Bodysafe silicone, ABS Battery-powered. Requires 2 AAA batteries ( not included) Running Time: Approx. 4 hours (Max Strength) Waterproof up to 50cm / 20″