A gorgeous Hollywood smile is less than an hour away! This teeth whitening system shares the technology used by dentists to make your teeth up to 4 shades whiter in just 1 hour and 2 easy steps! First, apply the whitening gel with the mess-free pen, then use the plasma light to gently speed up the whitening process. Touch up on the go with a spare whitening pen. Uses 3 AA batteries (not included).