SUPERIOR FLASHLIGHT - The Nite Ize INOVA Ultraviolet Microlight with Clip is an ingenious, precision-engineered micro UV LED flashlight for a multitude of uses. SUPER BRIGHT LED FLASHLIGHT - High-powered UV LED bulb has a 1,000-hour lifespan plus 365-400 nanometer wavelength. Four included functions: High Power, Low Power, Strobe, and Signal Mode. WATER AND CRUSH RESISTANT - Solid polycarbonate construction is water and crush resistant, with a temperature operation range from -4 degrees F / -20 degrees C to 104 degrees F / +40 degrees C. WITH UNIVERSAL CLIP - The Nite Ize INOVA Ultraviolet Microlight features a stainless steel universal clip that easily attaches to keys, zippers, backpacks, or any convenient location you need it to. LONG RUN TIME, COMPACT DESIGN - Runs on 2-2016 lithium batteries for up to 10 hours. Comes in a compact size of 1.85" x 1.00" x 0.33" (4.70cm x 2.54cm x 0.83cm) and weighs a mere 0.35 oz (9.22g).