Show them the light of your heart with these light-up heart nipple clamps! Choose between 3 different light patterns and give them a show they won't forget! The purple heart and the green, blue and red lights of the LEDs are sure to leave them dazzled! The metal clamps are fully adjustable simply turn the screw until the right pressure is achieved. The vinyl tips help keep the clamps firmly on the nipples and also protect against any abbrasion to the delicate skin. The LED lights are operated by 4 CR1220 batteries (included). Slowly place the clamps at the juncture between the nipples and the areola, clamp them slowly by twisting the screw until the pressure is right, and enjoy the show! Measurements: Overall length: 3.6 inches, Clamps open up to: 0.5 inches wide.