The silicone strap can be adjusted in two positions, allowing you to control the tightness and pressure of the masturbation cup. If you change the tightness, how you feel about masturbating will change too! With 11 adjustment holes, it is suitable for various sizes of masturbation cups and any tightening! It also has a vibrator strap that holds the vibrator in place, allowing you to add vibrator stimulation. WARNING: Keep the product away from children. DO NOT expose the product to humid places, direct UV or sunlight for an extended period.