The Yukon Bike is a 3 AA cell L.E.D. hybrid which combines the power of a focusable high output xenon bulb for dark night riding, along with 3 super bright L.E.D.’s for when a cyclist needs to be seen or when longer burn time is more important. Water resistant remote battery pack attaches to frame. Battery cord length: 54 inches. Burn time: 3-5 hrs (xenon), 120 hrs (LED). Wt: 7.8 oz, with batteries.