Police Security's Twin Power Ryder Headlamp is a groundbreaking, 550-lumen patent-pending technology that redefines traditional Dual Power functionality. Simply toggle between alkaline and rechargeable battery sources with the touch of a button, ensuring uninterrupted illumination whenever you need it. The built in rechargeable battery is housed in the head of the headlamp and the rear battery cartridge holds (3)AA 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.