There are several competing versions of the multicolor LED sunglasses, and these are the nicest we have found. The LEDs light up brighter than others (this is by far the brightest pair of light-up LED sunglasses we've seen). While others use just red, green, and blue LEDs, these utilize 4 different LED colors: green, blue, purple, and white. The purple and white LEDs really make this stand out as those premium LED colors are more expensive to manufacture and rarely used in LED toy items. The LEDs can be set to steady on or two different flashing patterns. The sunglass frame is much lighter weight yet more durable than the competition. These use three long-lasting AG13 batteries that run for an amazing 24+ hours before the batteries need to be changed (the quoted time reflects the run time of the sunglasses in the flashing mode -- steady-on mode runtime will be shorter). Add tinted lenses and a cool design and you've got a great bargain. Purchase your pair today and prepare to get noticed.