Princeton Tec Quad Headlamp has been designed with regulated circuitry to run on either alkaline or lithium batteries. Its four Ultrabright LEDs can light up the darkest corners with ease. The head torch's body has O-ring seals to make it waterproof to 1 metre. The Quad is a great headlamp for all outdoor activities and conditions. Its flexible and fully-adjustable headband fits to all head sizes and can be worn over a hat, too. Power: 78 Lumens 4 Ultrabright LEDs (regulated) Burn time: 108 hours Batteries: 3 x AAA Alkaline (included) Weight: 3.4oz (96g) with batteries UL Safety Rating: Approved Class I Division 2 Groups A, B, C, D, Class II Division 2 Groups F, G UL Temp Code: T4, Waterproof: IPX7 (1m) Princeton Tec Quad Headlamp