Once programmed and paired, the front light wirelessly controls the rear light when toggling through its modesUse the LED Ally app to setup only the modes you need, and up to four mode-sets for whatever type of riding is planned, day or nightThe front light features 8 modes, up to 1000 lumens of maximum output and features Lezyne`s MOR (Maximum Optical Reflection) lens which boosts and evenly distributes the lights beamRear light has 6 output modes with up to 75 lumens of output, a light and durable co-molded design thatÂ’s IPX7 (waterproof) rated, and features a cable free integrated USB charging stickBoth lights are connected and programmed using a phone app Black8F/6RComboSilicone StrapUSB1000/75UPC/EAN/GTIN: 4712806002695