The KonusLight RC-4 is a tactical flashlight with superior led cree technology. Fully constructed of metal, it can be either hand-held or mounted on a Weaver/Picatinny rail of any weapon by the enclosed mounting ring. It will generate an extremely powerful light beam and provides you with a variety of functions (three different intensities, flashing mode, s.o.s. mode) for utmost versatility. The RC-4 is rechargeable and includes a remote control, rifle attachment, and a connector protective ring. It also includes a Lithium battery.