Fenix BT20 is the world's first professional Bilke Light which emply Dual Distance Beam System. It features broad floodlight, Close-in visibility and long-range illumination. BT20 Employs the neutral white LED featuring the advantages of strong penetration power and good color rendering which helps night riders better identify the color of objects and outdoor conditionsensuring safety when mountain biking, touring, commuting etc. This bundle include, Fenix BT20 750 Lumens bike Light Fenix Battery Case Fenix Battery case Sleeve Helmet Mount O ring Mounting Straps X 3 Extension Cable EdisonBright CR123 Batteries X 4