Premium Silicone enhancer with built-in scrotum support that is stretchy and comfortable for him. Removable wireless stimulator with intense vibrations that resonate throughout. - - Waterproof , - MATERIALS: Silicone (enhancer) ABS with Silver Plating (stimulator) , - 3 Watch Batteries Required (6 Included) , - 4.25" x 1.75"/10.75 cm x 4.5 cm (enhancer) , - 2.25" x .75"/5.75 cm x 2 cm (stimulator) Remove batteries when not in use. Twist cap securely before use. Use no longer than 30 minutes at a time. Wash before and after each use.