The most advanced front/rear cycling light combo available, the Connect Smart 1000XL / KTV Smart Pair comes equipped with our Smart Connect wireless technology. This pair of lights can be quickly programmed and customized by the companion LED Ally phone app. Once programmed and paired, the front light wirelessly controls the rear light when toggling through its modes. Setup only the modes you need. Up to four mode-sets for whatever type of riding is planned, day or night.