This is Tektite Strobe 4500 Dive Light, dual-LED 13-Watt LED StrobeFeatures Depth Rating: 500 feet (150 m), IP68M Lamp: Dual, High-intensity, white LED Strobe Lumens: 1,300+ source Lamp Life: 10,000+ Hours (36+ Million Flashes) Initial flash rate: 120 flashes per minute (2 Hz) with fresh batteries Burn Time: 60+ hours, with fresh batteries Batteries: 3 C-cell Alkaline (included) Materials: ABS and LEXANA(R) Weight: 12 oz./ 340g Length: 9.25" / 23.5cm Diameter: 2" / 5cm (at lens) Switch: Twist on, rotary switch Made in the U.S.A. (complies with the "Buy American Act", may contain imported components). Lifetime Warranty The TektiteA(R) Strobe 4500(TM) is the latest edition of Tektite&';s durable, polymer high-end strobes. Significantly brighter than the Strobe 3500(TM), the Strobe 4500(TM) uses a dual high-intensity LEDs that can be seen for miles at night (conditions permitting with a clear lens). This durable strobe, crafted from ABS and LEXANA(R), is even more rugged with Tektite&';s new LEDs and circuitry . The Strobe 4500(TM) is double O-ring sealed, waterproof and dive rated to 500 feet (150 m). Optional color lenses are available. Includes, at no additional cost, a hook-and-loop strap."