With regulated circuitry, Quad can run on alkaline or lithium batteries. Four Ultrabright LEDs illuminate the darkest conditions with a wide flood beam. QuadÃƒ¢Ã¢â€š¬Ã¢â€ž¢s housing features molecularly bonded O-ring seal for waterproof durability. With a low battery indicator, a separately molded battery tray and high-grade materials, the Quad is a popular headlamp for paddling and general outdoor use. Also available are Quad Tac with three colored filters, and the CL1DIV1 Intrinsically Safe Quad II.