Police Security's Twin Power headlamp is an ultra-bright, 1500 Lumen patent-pending headlamp that redefines traditional Dual Power functionality. Simply toggle between alkaline and rechargeable battery sources with the touch of a button, conveniently located on the top of the headlamp ensuring uninterrupted illumination whenever you need it. The built-in rechargeable battery is housed in the head of the head lamp, and the rear battery cartridge holds 3AAA batteries. With this innovative design, you'll never face the dilemma of drained power. Twist focus and comfort adjust straps make this headlamp versatile for a variety of hands-free uses.