The UH-01E connects a HellFighter 4 to one or two BA-5590 batteries. Includes socket for optional UH-01DA, UH-05DA, or UH-05DB adapter cables. Branching cable has SW-M2HB-03 grip switch assembly with integrated high, low, and strobe switches. Also compatible with the original HellFighter but does not provide high, low, and strobe capabilities to that light. Two M2HB grip switch Installation wrenches are included.