This is the Tektite Strobe 3500 10-watt LED Scuba Dive Light Flashlight Features: Depth Rating: 500 feet (150 m), IP68M Lamp: High-intensity, Multifunction 10-Watt LED Strobe Burn Time: 100 hours in flashing mode or 20 hours in steady mode with fresh batteries Initial flash rate: 120 flashes per minute (2 Hz) with fresh batteries Batteries: 3 C-cell Alkaline (included) CE (European Union compliant) Materials: ABS and LEXAN Visible for several miles with clear lens (conditions permitting) Lamp Life: 10,000+ Hours (36+ Million Flashes) Twist on, rotary switch Made in the U.S.A. (complies with the Buy American Act", may contain imported components). Lifetime Warranty The Tektite Strobe 3500(TM) is the durable, polymer version of our popular Strobe 3500(TM) XL Expedition. Boasting significantly brighter output as well as better battery life than our Strobe 300(TM), the Strobe 3500(TM) uses a high-intensity, multifunction, 10-watt LED strobe that can be seen for miles at night (conditions permitting with a clear lens). This durable strobe, crafted from ABS and LEXAN, is even more rugged than our Strobe 300(TM) since there are no fragile glass strobe tubes to break. The Strobe 3500(TM) is double O-ring sealed, waterproof and dive rated to 500 feet (150 m). Optional color lenses available. Includes, at no additional cost, a Velcro strap. An Infrared (IR) version is available to approved government and military organizations. "