Great bite indicator from Delkim. The NiteLite Indication Set consists of the NiteLite v.2 Illuminating Hanger, the SlimCarb Carbon Stabilizer and ‘C-Slot’ weights. This system is an evolution of the NiteLite Pro and the SlimLite Indication Set, now allowing you to use heavier weights to handle a wider range of conditions. You can connect this indicator to your Delkim and no additional batteries are required. It corresponds to all LED functions of your Delkim alarm. The patented self-adjusting line clip is great. You can use the hangers on their own, or in conjunction with the unique Tilt ‘N’ Slide SlimCarb Carbon Stabilizer, so you can fish sharp even in windy conditions. Also check out the video of this high quality product!