These remarkable, solid "Cylinders of Light" utilize Super High Bright LED's for their light source, measure approximately 2-3/4" high by 3" diameter and are waterproof rated to 3500 meters. They come in 5 different colors (Clear, Amber, Blue, Green and Red). The Glo-Toob Dive Light is the world`s toughest, brightest, and smallest emergency light marker. It's so powerful that it can be seen from over 1 mile away. Includes different display settings: 100% to get the most power, 25% to save more battery, and strobe for the best attention-getter. Innovative has been designing and manufacturing scuba diving and ocean equipment for more than 25 years. We combine our experience with cutting edge materials and designs to create highly functional, premium quality equipment that is built to last. All of our products come with a full Manufacturer's Warranty.