The Tektite® Strobe 3500™ is our latest edition of our durable, polymer high-end strobes. Significantly brighter than our Strobe 3500™, the Strobe 4500™ 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 LEXAN®, is even more rugged with our new LEDs and circuitry . The Strobe 4500™ is double O-ring sealed, waterproof and dive rated to 500 feet (150 m).