Deep dish parabolic reflector produces a tight beam with optimum peripheral illumination. The 2 ultra-bright blue taillight LEDs can be seen through thick smoke. Run Times: Steady LED and Taillights - Up to 3 hours to the 10% output level (High) and up to 6 hours (Low). IPX rated design - waterproof to 1 meter for 30 minutes. 8 total programmable functions - 4 functions when toggle switch in "left" position and 4 functions when toggle switch is in "right" position. Raised handle and toggle "on-off" switch ensure ease of use with a gloved hand. Fits existing Streamlight Vulcan chargers and serialized for positive identification