Petzl - DUO LED 5 Headlamp, Hybrid Waterproof Helmet, 40 Lumens TOUGH AS NAILS: The DUO LED 5 Headlamp is an all-terrain headlamp and perfect for watersports. Features a rugged construction and is waterproof to -1 meter. LIGHT UP THE NIGHT: Includes two light sources to use based on your activity. Halogen light for long-range and five LEDs for flood beam lighting with a long burn time. DON'T GET CAUGHT IN THE DARK: With its max battery life at 65 hours, the DUO LED 5 is prepared for your late night adventures. COMFORT IS KEY: Features an adjustable, comfortable elastic headband. Also, the on/off switch can be locked to prevent accidental operation. NEXT LEVEL NIGHT VISION: Operates on four AA/LR6 batteries (included), or with optional ACCU DUO rechargeable battery pack. (not included)